Rheem R-410A User Manual

Dual 7-Segment
LEDs Display
Code
Diagnostic Description
Status/Possible Cause – Troubleshooting
Information
2
1 – Low Pressure Control Open
T
he ICC detects the LPC is open.
N
ote: The low pressure control is ignored
f
or the first 90 seconds of compressor
o
peration
•
Unit has low refrigerant charge
•
Indoor coil is frozen (cooling mode)
•
Dirty indoor coil or filter (cooling mode)
•
Indoor blower is not running (cooling mode)
•
Outdoor coil is frozen (heating mode)
•
Expansion valve is not operating correctly
12
21 – Low Pressure Control Open
The ICC detects the LPC is open.
Note: The low pressure control is ignored
for the first 90 seconds of compressor
o
peration
•
Unit has low refrigerant charge
• Indoor coil is frozen (cooling mode)
•
Dirty indoor coil or filter (cooling mode)
•
Indoor blower is not running (cooling mode)
• Outdoor coil is frozen (heating mode)
• Outdoor fan is not running (heating mode)
• Expansion valve is not operating correctly
FLASHING
L21 – Active Protection
Low Pressure
Control Trip
The ICC has locked out the compressor due to
three (3) consecutive LPC trips on the same
command for unit operation
27 – Low Line Voltage or No Line Voltage
Fault
• Check incoming line voltage to the disconnect
and unit
• Check wiring connections
28 – High Line Voltage Fault
• Check line voltage
29 – High Pressure Control Open
The ICC detects the HPC is open
• Outdoor coil is dirty (cooling mode)
• Outdoor fan is not running (cooling mode)
• Dirty indoor coil or filter (heating mode)
• Indoor blower is not running (heating mode)
• Liquid line restriction
• Excessive refrigerant charge
FLASHING
L29 – Active Protection High Pressure
Control Trip
The ICC has locked out the compressor due to
three (3) consecutive HPC trips on the same
command for unit operation
30 – Fuse Open
The ICC detects the on-board fuse is open
• The 3-amp fuse on the ICC is open.
• Low voltage wiring at R and C is damaged or
miswired.
83 – Condenser Coil Temperature Fault
The sensor detects an abnormally low or
high coil temperature
• Replace the sensor
84 – Outdoor Ambient Temperature Fault
The sensor detects an abnormally low or
high outdoor ambient temperature
• Check unit placement – If the outdoor unit is in
a high temperature area, wait until the ambient
temperature drops and check sensor reading.
• Replace the sensor.
90 – Communication Fault
The ICC detects and internal fault condition
• Replace the ICC.
L
21 – Active Protection
L
ow Pressure
Control Trip
L
PC has opened 3 times in the same cooling
operation, the ICC has locked out the compressor
to protect it. ICC alternately flashes L and 21
12
21 – Low Pressure Control Open
T
he ICC detects the LPC is open.
Note: The low pressure control is ignored
f
or the first 90 seconds of compressor
operation
• Unit has low refrigerant charge
• Indoor coil is frozen (cooling mode)
• Dirty indoor coil or filter (cooling mode)
• Indoor blower is not running (cooling mode)
•
Outdoor coil is frozen (heating mode)
• Outdoor fan is not running (heating mode)
• Expansion valve is not operating correctly
FLASHING
L21 – Active Protection
Low Pressure
Control Trip
The ICC has locked out the compressor due to
three (3) consecutive LPC trips on the same
command for unit operation
27 – Low Line Voltage or No Line Voltage
Fault
• Check incoming line voltage to the disconnect
and unit
• Check wiring connections
28 – High Line Voltage Fault
• Check line voltage
29 – High Pressure Control Open
The ICC detects the HPC is open
• Outdoor coil is dirty (cooling mode)
• Outdoor fan is not running (cooling mode)
• Dirty indoor coil or filter (heating mode)
• Indoor blower is not running (heating mode)
• Liquid line restriction
• Excessive refrigerant charge
FLASHING
L29 – Active Protection High Pressure
Control Trip
The ICC has locked out the compressor due to
three (3) consecutive HPC trips on the same
command for unit operation
30 – Fuse Open
The ICC detects the on-board fuse is open
• The 3-amp fuse on the ICC is open.
• Low voltage wiring at R and C is damaged or
miswired.
83 – Condenser Coil Temperature Fault
The sensor detects an abnormally low or
high coil temperature
• Replace the sensor
84 – Outdoor Ambient Temperature Fault
The sensor detects an abnormally low or
high outdoor ambient temperature
• Check unit placement – If the outdoor unit is in
a high temperature area, wait until the ambient
temperature drops and check sensor reading.
• Replace the sensor.
90 – Communication Fault
The ICC detects and internal fault condition
• Replace the ICC.
27 – Low Line Voltage or No Line Voltage
Fault
• Check incoming line voltage to the disconnect
and unit
• Check wiring connections
12
2
1 – Low Pressure Control Open
T
he ICC detects the LPC is open.
Note: The low pressure control is ignored
f
or the first 90 seconds of compressor
operation
• Unit has low refrigerant charge
• Indoor coil is frozen (cooling mode)
• Dirty indoor coil or filter (cooling mode)
• Indoor blower is not running (cooling mode)
• Outdoor coil is frozen (heating mode)
• Outdoor fan is not running (heating mode)
• Expansion valve is not operating correctly
FLASHING
L21 – Active Protection
Low Pressure
Control Trip
The ICC has locked out the compressor due to
three (3) consecutive LPC trips on the same
command for unit operation
27 – Low Line Voltage or No Line Voltage
Fault
• Check incoming line voltage to the disconnect
and unit
• Check wiring connections
28 – High Line Voltage Fault
• Check line voltage
29 – High Pressure Control Open
The ICC detects the HPC is open
• Outdoor coil is dirty (cooling mode)
• Outdoor fan is not running (cooling mode)
• Dirty indoor coil or filter (heating mode)
• Indoor blower is not running (heating mode)
• Liquid line restriction
• Excessive refrigerant charge
FLASHING
L29 – Active Protection High Pressure
Control Trip
The ICC has locked out the compressor due to
three (3) consecutive HPC trips on the same
command for unit operation
30 – Fuse Open
The ICC detects the on-board fuse is open
• The 3-amp fuse on the ICC is open.
• Low voltage wiring at R and C is damaged or
miswired.
83 – Condenser Coil Temperature Fault
The sensor detects an abnormally low or
high coil temperature
• Replace the sensor
84 – Outdoor Ambient Temperature Fault
The sensor detects an abnormally low or
high outdoor ambient temperature
• Check unit placement – If the outdoor unit is in
a high temperature area, wait until the ambient
temperature drops and check sensor reading.
• Replace the sensor.
90 – Communication Fault
The ICC detects and internal fault condition
• Replace the ICC.
28 – High Line Voltage Fault • Check line voltage
12
21 – Low Pressure Control Open
The ICC detects the LPC is open.
Note: The low pressure control is ignored
for the first 90 seconds of compressor
o
peration
•
Unit has low refrigerant charge
• Indoor coil is frozen (cooling mode)
•
Dirty indoor coil or filter (cooling mode)
•
Indoor blower is not running (cooling mode)
• Outdoor coil is frozen (heating mode)
• Outdoor fan is not running (heating mode)
• Expansion valve is not operating correctly
FLASHING
L21 – Active Protection
Low Pressure
Control Trip
The ICC has locked out the compressor due to
three (3) consecutive LPC trips on the same
command for unit operation
27 – Low Line Voltage or No Line Voltage
Fault
• Check incoming line voltage to the disconnect
and unit
• Check wiring connections
28 – High Line Voltage Fault
• Check line voltage
29 – High Pressure Control Open
The ICC detects the HPC is open
• Outdoor coil is dirty (cooling mode)
• Outdoor fan is not running (cooling mode)
• Dirty indoor coil or filter (heating mode)
• Indoor blower is not running (heating mode)
• Liquid line restriction
• Excessive refrigerant charge
FLASHING
L29 – Active Protection High Pressure
Control Trip
The ICC has locked out the compressor due to
three (3) consecutive HPC trips on the same
command for unit operation
30 – Fuse Open
The ICC detects the on-board fuse is open
• The 3-amp fuse on the ICC is open.
• Low voltage wiring at R and C is damaged or
miswired.
83 – Condenser Coil Temperature Fault
The sensor detects an abnormally low or
high coil temperature
• Replace the sensor
84 – Outdoor Ambient Temperature Fault
The sensor detects an abnormally low or
high outdoor ambient temperature
• Check unit placement – If the outdoor unit is in
a high temperature area, wait until the ambient
temperature drops and check sensor reading.
• Replace the sensor.
90 – Communication Fault
The ICC detects and internal fault condition
• Replace the ICC.
29 – High Pressure Control Open
The ICC detects the HPC is open
• Outdoor coil is dirty (cooling mode)
• Outdoor fan is not running (cooling mode)
• Dirty indoor coil or filter (heating mode)
• Indoor blower is not running (heating mode)
• Liquid line restriction
• Excessive refrigerant charge
12
21 – Low Pressure Control Open
The ICC detects the LPC is open.
Note: The low pressure control is ignored
for the first 90 seconds of compressor
o
peration
•
Unit has low refrigerant charge
•
Indoor coil is frozen (cooling mode)
• Dirty indoor coil or filter (cooling mode)
•
Indoor blower is not running (cooling mode)
• Outdoor coil is frozen (heating mode)
• Outdoor fan is not running (heating mode)
• Expansion valve is not operating correctly
FLASHING
L21 – Active Protection
Low Pressure
Control Trip
The ICC has locked out the compressor due to
three (3) consecutive LPC trips on the same
command for unit operation
27 – Low Line Voltage or No Line Voltage
Fault
• Check incoming line voltage to the disconnect
and unit
• Check wiring connections
28 – High Line Voltage Fault
• Check line voltage
29 – High Pressure Control Open
The ICC detects the HPC is open
• Outdoor coil is dirty (cooling mode)
• Outdoor fan is not running (cooling mode)
• Dirty indoor coil or filter (heating mode)
• Indoor blower is not running (heating mode)
• Liquid line restriction
• Excessive refrigerant charge
FLASHING
L29 – Active Protection High Pressure
Control Trip
The ICC has locked out the compressor due to
three (3) consecutive HPC trips on the same
command for unit operation
30 – Fuse Open
The ICC detects the on-board fuse is open
• The 3-amp fuse on the ICC is open.
• Low voltage wiring at R and C is damaged or
miswired.
83 – Condenser Coil Temperature Fault
The sensor detects an abnormally low or
high coil temperature
• Replace the sensor
84 – Outdoor Ambient Temperature Fault
The sensor detects an abnormally low or
high outdoor ambient temperature
• Check unit placement – If the outdoor unit is in
a high temperature area, wait until the ambient
temperature drops and check sensor reading.
• Replace the sensor.
90 – Communication Fault
The ICC detects and internal fault condition
• Replace the ICC.
L29 – Active Protection High Pressure
Control Trip
LPC has opened 3 times in the same cooling
operation, the ICC has locked out the compressor
to protect it. ICC alternately flashes L and 29
12
21 – Low Pressure Control Open
T
he ICC detects the LPC is open.
Note: The low pressure control is ignored
f
or the first 90 seconds of compressor
operation
• Unit has low refrigerant charge
• Indoor coil is frozen (cooling mode)
• Dirty indoor coil or filter (cooling mode)
• Indoor blower is not running (cooling mode)
•
Outdoor coil is frozen (heating mode)
•
Outdoor fan is not running (heating mode)
• Expansion valve is not operating correctly
FLASHING
L21 – Active Protection
Low Pressure
Control Trip
The ICC has locked out the compressor due to
three (3) consecutive LPC trips on the same
command for unit operation
27 – Low Line Voltage or No Line Voltage
Fault
• Check incoming line voltage to the disconnect
and unit
• Check wiring connections
28 – High Line Voltage Fault
• Check line voltage
29 – High Pressure Control Open
The ICC detects the HPC is open
• Outdoor coil is dirty (cooling mode)
• Outdoor fan is not running (cooling mode)
• Dirty indoor coil or filter (heating mode)
• Indoor blower is not running (heating mode)
• Liquid line restriction
• Excessive refrigerant charge
FLASHING
L29 – Active Protection High Pressure
Control Trip
The ICC has locked out the compressor due to
three (3) consecutive HPC trips on the same
command for unit operation
30 – Fuse Open
The ICC detects the on-board fuse is open
• The 3-amp fuse on the ICC is open.
• Low voltage wiring at R and C is damaged or
miswired.
83 – Condenser Coil Temperature Fault
The sensor detects an abnormally low or
high coil temperature
• Replace the sensor
84 – Outdoor Ambient Temperature Fault
The sensor detects an abnormally low or
high outdoor ambient temperature
• Check unit placement – If the outdoor unit is in
a high temperature area, wait until the ambient
temperature drops and check sensor reading.
• Replace the sensor.
90 – Communication Fault
The ICC detects and internal fault condition
• Replace the ICC.
80 – Low Air Flow
The ICC detects that the indoor unit is
not providing the minimum airflow
requirements.
• Misapplied/wrong indoor air mover –
replace with properly sized unit.
12
21 – Low Pressure Control Open
The ICC detects the LPC is open.
Note: The low pressure control is ignored
for the first 90 seconds of compressor
operation
• Unit has low refrigerant charge
• Indoor coil is frozen (cooling mode)
• Dirty indoor coil or filter (cooling mode)
• Indoor blower is not running (cooling mode)
• Outdoor coil is frozen (heating mode)
• Outdoor fan is not running (heating mode)
• Expansion valve is not operating correctly
FLASHING
L21 – Active Protection
Low Pressure
Control Trip
The ICC has locked out the compressor due to
three (3) consecutive LPC trips on the same
command for unit operation
27 – Low Line Voltage or No Line Voltage
Fault
• Check incoming line voltage to the disconnect
and unit
• Check wiring connections
28 – High Line Voltage Fault
• Check line voltage
29 – High Pressure Control Open
The ICC detects the HPC is open
• Outdoor coil is dirty (cooling mode)
• Outdoor fan is not running (cooling mode)
• Dirty indoor coil or filter (heating mode)
• Indoor blower is not running (heating mode)
• Liquid line restriction
• Excessive refrigerant charge
FLASHING
L29 – Active Protection High Pressure
Control Trip
The ICC has locked out the compressor due to
three (3) consecutive HPC trips on the same
command for unit operation
30 – Fuse Open
The ICC detects the on-board fuse is open
• The 3-amp fuse on the ICC is open.
• Low voltage wiring at R and C is damaged or
miswired.
83 – Condenser Coil Temperature Fault
The sensor detects an abnormally low or
high coil temperature
• Replace the sensor
84 – Outdoor Ambient Temperature Fault
The sensor detects an abnormally low or
high outdoor ambient temperature
• Check unit placement – If the outdoor unit is in
a high temperature area, wait until the ambient
temperature drops and check sensor reading.
• Replace the sensor.
90 – Communication Fault
The ICC detects and internal fault condition
• Replace the ICC.
12
21 – Low Pressure Control Open
The ICC detects the LPC is open.
Note: The low pressure control is ignored
for the first 90 seconds of compressor
operation
• Unit has low refrigerant charge
• Indoor coil is frozen (cooling mode)
• Dirty indoor coil or filter (cooling mode)
• Indoor blower is not running (cooling mode)
• Outdoor coil is frozen (heating mode)
• Outdoor fan is not running (heating mode)
• Expansion valve is not operating correctly
FLASHING
L21 – Active Protection
Low Pressure
Control Trip
The ICC has locked out the compressor due to
three (3) consecutive LPC trips on the same
command for unit operation
27 – Low Line Voltage or No Line Voltage
Fault
• Check incoming line voltage to the disconnect
and unit
• Check wiring connections
28 – High Line Voltage Fault
• Check line voltage
29 – High Pressure Control Open
The ICC detects the HPC is open
• Outdoor coil is dirty (cooling mode)
• Outdoor fan is not running (cooling mode)
• Dirty indoor coil or filter (heating mode)
• Indoor blower is not running (heating mode)
• Liquid line restriction
• Excessive refrigerant charge
FLASHING
L29 – Active Protection High Pressure
Control Trip
The ICC has locked out the compressor due to
three (3) consecutive HPC trips on the same
command for unit operation
30 – Fuse Open
The ICC detects the on-board fuse is open
• The 3-amp fuse on the ICC is open.
• Low voltage wiring at R and C is damaged or
miswired.
83 – Condenser Coil Temperature Fault
The sensor detects an abnormally low or
high coil temperature
• Replace the sensor
84 – Outdoor Ambient Temperature Fault
The sensor detects an abnormally low or
high outdoor ambient temperature
• Check unit placement – If the outdoor unit is in
a high temperature area, wait until the ambient
temperature drops and check sensor reading.
• Replace the sensor.
90 – Communication Fault
The ICC detects and internal fault condition
• Replace the ICC.
83 – Condenser Coil Temperature Fault
The sensor detects an abnormally low or
high coil temperature
• Replace the sensor
• Check sensor is installed correctly on control
12
2
1 – Low Pressure Control Open
The ICC detects the LPC is open.
N
ote: The low pressure control is ignored
for the first 90 seconds of compressor
operation
• Unit has low refrigerant charge
•
Indoor coil is frozen (cooling mode)
• Dirty indoor coil or filter (cooling mode)
• Indoor blower is not running (cooling mode)
• Outdoor coil is frozen (heating mode)
• Outdoor fan is not running (heating mode)
• Expansion valve is not operating correctly
FLASHING
L21 – Active Protection
Low Pressure
Control Trip
The ICC has locked out the compressor due to
three (3) consecutive LPC trips on the same
command for unit operation
27 – Low Line Voltage or No Line Voltage
Fault
• Check incoming line voltage to the disconnect
and unit
• Check wiring connections
28 – High Line Voltage Fault
• Check line voltage
29 – High Pressure Control Open
The ICC detects the HPC is open
• Outdoor coil is dirty (cooling mode)
• Outdoor fan is not running (cooling mode)
• Dirty indoor coil or filter (heating mode)
• Indoor blower is not running (heating mode)
• Liquid line restriction
• Excessive refrigerant charge
FLASHING
L29 – Active Protection High Pressure
Control Trip
The ICC has locked out the compressor due to
three (3) consecutive HPC trips on the same
command for unit operation
30 – Fuse Open
The ICC detects the on-board fuse is open
• The 3-amp fuse on the ICC is open.
• Low voltage wiring at R and C is damaged or
miswired.
83 – Condenser Coil Temperature Fault
The sensor detects an abnormally low or
high coil temperature
• Replace the sensor
84 – Outdoor Ambient Temperature Fault
The sensor detects an abnormally low or
high outdoor ambient temperature
• Check unit placement – If the outdoor unit is in
a high temperature area, wait until the ambient
temperature drops and check sensor reading.
• Replace the sensor.
90 – Communication Fault
The ICC detects and internal fault condition
• Replace the ICC.
84 – Outdoor Ambient Temperature Fault
The sensor detects an abnormally low or
high outdoor ambient temperature
• Check unit placement – If the outdoor unit is in
a high temperature area, wait until the ambient
temperature drops and check sensor reading.
• Replace the sensor.
• Check sensor is installed correctly on control
12
21 – Low Pressure Control Open
The ICC detects the LPC is open.
N
ote: The low pressure control is ignored
for the first 90 seconds of compressor
operation
• Unit has low refrigerant charge
•
Indoor coil is frozen (cooling mode)
• Dirty indoor coil or filter (cooling mode)
• Indoor blower is not running (cooling mode)
• Outdoor coil is frozen (heating mode)
• Outdoor fan is not running (heating mode)
• Expansion valve is not operating correctly
FLASHING
L21 – Active Protection
Low Pressure
Control Trip
The ICC has locked out the compressor due to
three (3) consecutive LPC trips on the same
command for unit operation
27 – Low Line Voltage or No Line Voltage
Fault
• Check incoming line voltage to the disconnect
and unit
• Check wiring connections
28 – High Line Voltage Fault
• Check line voltage
29 – High Pressure Control Open
The ICC detects the HPC is open
• Outdoor coil is dirty (cooling mode)
• Outdoor fan is not running (cooling mode)
• Dirty indoor coil or filter (heating mode)
• Indoor blower is not running (heating mode)
• Liquid line restriction
• Excessive refrigerant charge
FLASHING
L29 – Active Protection High Pressure
Control Trip
The ICC has locked out the compressor due to
three (3) consecutive HPC trips on the same
command for unit operation
30 – Fuse Open
The ICC detects the on-board fuse is open
• The 3-amp fuse on the ICC is open.
• Low voltage wiring at R and C is damaged or
miswired.
83 – Condenser Coil Temperature Fault
The sensor detects an abnormally low or
high coil temperature
• Replace the sensor
84 – Outdoor Ambient Temperature Fault
The sensor detects an abnormally low or
high outdoor ambient temperature
• Check unit placement – If the outdoor unit is in
a high temperature area, wait until the ambient
temperature drops and check sensor reading.
• Replace the sensor.
90 – Communication Fault
The ICC detects and internal fault condition
• Replace the ICC.
93 – Internal Control Fault
The control is not functioning
properly.
• Check control for proper system
operation.
• Replace control
12
21 – Low Pressure Control Open
T
he ICC detects the LPC is open.
Note: The low pressure control is ignored
for the first 90 seconds of compressor
operation
• Unit has low refrigerant charge
• Indoor coil is frozen (cooling mode)
• Dirty indoor coil or filter (cooling mode)
• Indoor blower is not running (cooling mode)
• Outdoor coil is frozen (heating mode)
• Outdoor fan is not running (heating mode)
• Expansion valve is not operating correctly
FLASHING
L21 – Active Protection
Low Pressure
Control Trip
The ICC has locked out the compressor due to
three (3) consecutive LPC trips on the same
command for unit operation
27 – Low Line Voltage or No Line Voltage
Fault
• Check incoming line voltage to the disconnect
and unit
• Check wiring connections
28 – High Line Voltage Fault
• Check line voltage
29 – High Pressure Control Open
The ICC detects the HPC is open
• Outdoor coil is dirty (cooling mode)
• Outdoor fan is not running (cooling mode)
• Dirty indoor coil or filter (heating mode)
• Indoor blower is not running (heating mode)
• Liquid line restriction
• Excessive refrigerant charge
FLASHING
L29 – Active Protection High Pressure
Control Trip
The ICC has locked out the compressor due to
three (3) consecutive HPC trips on the same
command for unit operation
30 – Fuse Open
The ICC detects the on-board fuse is open
• The 3-amp fuse on the ICC is open.
• Low voltage wiring at R and C is damaged or
miswired.
83 – Condenser Coil Temperature Fault
The sensor detects an abnormally low or
high coil temperature
• Replace the sensor
84 – Outdoor Ambient Temperature Fault
The sensor detects an abnormally low or
high outdoor ambient temperature
• Check unit placement – If the outdoor unit is in
a high temperature area, wait until the ambient
temperature drops and check sensor reading.
• Replace the sensor.
90 – Communication Fault
The ICC detects and internal fault condition
• Replace the ICC.
12
21 – Low Pressure Control Open
The ICC detects the LPC is open.
Note: The low pressure control is ignored
for the first 90 seconds of compressor
operation
• Unit has low refrigerant charge
• Indoor coil is frozen (cooling mode)
• Dirty indoor coil or filter (cooling mode)
• Indoor blower is not running (cooling mode)
• Outdoor coil is frozen (heating mode)
• Outdoor fan is not running (heating mode)
• Expansion valve is not operating correctly
FLASHING
L21 – Active Protection
Low Pressure
Control Trip
The ICC has locked out the compressor due to
three (3) consecutive LPC trips on the same
command for unit operation
27 – Low Line Voltage or No Line Voltage
Fault
• Check incoming line voltage to the disconnect
and unit
• Check wiring connections
28 – High Line Voltage Fault
• Check line voltage
29 – High Pressure Control Open
The ICC detects the HPC is open
• Outdoor coil is dirty (cooling mode)
• Outdoor fan is not running (cooling mode)
• Dirty indoor coil or filter (heating mode)
• Indoor blower is not running (heating mode)
• Liquid line restriction
• Excessive refrigerant charge
FLASHING
L29 – Active Protection High Pressure
Control Trip
The ICC has locked out the compressor due to
three (3) consecutive HPC trips on the same
command for unit operation
30 – Fuse Open
The ICC detects the on-board fuse is open
• The 3-amp fuse on the ICC is open.
• Low voltage wiring at R and C is damaged or
miswired.
83 – Condenser Coil Temperature Fault
The sensor detects an abnormally low or
high coil temperature
• Replace the sensor
84 – Outdoor Ambient Temperature Fault
The sensor detects an abnormally low or
high outdoor ambient temperature
• Check unit placement – If the outdoor unit is in
a high temperature area, wait until the ambient
temperature drops and check sensor reading.
• Replace the sensor.
90 – Communication Fault
The ICC detects and internal fault condition
• Replace the ICC.
30 – Fuse Open
The ICC detects the on-board fuse is open
• The 3-amp fuse on the ICC is open.
• Low voltage wiring at R and C is damaged or
miswired.
12
2
1 – Low Pressure Control Open
The ICC detects the LPC is open.
N
ote: The low pressure control is ignored
f
or the first 90 seconds of compressor
operation
• Unit has low refrigerant charge
• Indoor coil is frozen (cooling mode)
• Dirty indoor coil or filter (cooling mode)
• Indoor blower is not running (cooling mode)
• Outdoor coil is frozen (heating mode)
• Outdoor fan is not running (heating mode)
• Expansion valve is not operating correctly
FLASHING
L21 – Active Protection
Low Pressure
Control Trip
The ICC has locked out the compressor due to
three (3) consecutive LPC trips on the same
command for unit operation
27 – Low Line Voltage or No Line Voltage
Fault
• Check incoming line voltage to the disconnect
and unit
• Check wiring connections
28 – High Line Voltage Fault
• Check line voltage
29 – High Pressure Control Open
The ICC detects the HPC is open
• Outdoor coil is dirty (cooling mode)
• Outdoor fan is not running (cooling mode)
• Dirty indoor coil or filter (heating mode)
• Indoor blower is not running (heating mode)
• Liquid line restriction
• Excessive refrigerant charge
FLASHING
L29 – Active Protection High Pressure
Control Trip
The ICC has locked out the compressor due to
three (3) consecutive HPC trips on the same
command for unit operation
30 – Fuse Open
The ICC detects the on-board fuse is open
• The 3-amp fuse on the ICC is open.
• Low voltage wiring at R and C is damaged or
miswired.
83 – Condenser Coil Temperature Fault
The sensor detects an abnormally low or
high coil temperature
• Replace the sensor
84 – Outdoor Ambient Temperature Fault
The sensor detects an abnormally low or
high outdoor ambient temperature
• Check unit placement – If the outdoor unit is in
a high temperature area, wait until the ambient
temperature drops and check sensor reading.
• Replace the sensor.
90 – Communication Fault
The ICC detects and internal fault condition
• Replace the ICC.
27

Rheem R-410A Specifications

General

Brand	Rheem
Model	R-410A
Category	Heat Pump
Language	English