Amana AVZC20 User Manual

34
TROUBLESHOOTING
ClimateTalk
Fault Code
PCB LED
Display
Transmitted ClimateTalk
Message
Thermostat Fault Probable Causes Corrective Actions
22 E22 HI DISCH TEMP
This error indicates the equipment is
experiencing frequent high discharge
temperature faults.
Discharge thermistor is not put on
correct position.
● Discharge thermistor inoperable or
improperl
y
connected
● Discharge thermistor is put on incorrect
position or off
● Low refrigerant charge
● Overcharge
● Faulty compressor
● Check discharge thermistor resistance and
connections; Repair/replace as needed
● Check discharge thermistor position
● Check refrigerant charge level; Adjust if needed
● Check the compressor; Repair/replace if needed
23 E23 DISCH TEMP FAIL
The control has detected that the
Discharge Temperature Sensor is out of
range.
● Discharge thermistor inoperable or
improperl
y
connected
● Check discharge thermistor resistance and
connections; Repair/replace as needed
24 E24 HPS OPEN The high pressure switch is open. ● High pressure switch (HPS) inoperable
● Check resistance on HPS to verify operation; Replace
if needed
25 E25 AIR SENSOR FLT
The outdoor air temperature sensor is
open or shorted.
● Faulty outdoor thermistor sensor or
disconnect
● Inspect and test sensor; Replace sensor if needed
26 E26 PRESSURE SENSOR
The control determines that the pressure
sensor is not reacting properly.
● Low pressure sensor inoperable or not
properly connected
● Check the connection to low pressure sensor;
Repair/replace if needed
27 E27 COIL TEMP FAIL1
The control detects that the Outdoor
Defrost Sensor is out of range.
● Outdoor defrost thermistor inoperable or not
properly connected
● Check the connection to OD defrost thermistor; Repair
as needed
28 E28 COIL TEMP FAIL2
The control has detected that the Outdoor
Coil Temperature Sensor is out of range.
● Outdoor coil thermistor inoperable or not
properly connected
● Check the connection to OD coil thermistor;
Repair/replace if needed
29 E29 LIQ TEMP FAIL
The control has detected that the Liquid
Temperature Sensor is out of range.
● Liquid thermistor inoperable or not properly
connected
● Check the connection to liquid thermistor;
Repair/replace if needed
30 E30 OD CTRL FAIL3
Indicates the control board may need to
be replaced.
● Wiring to control board disconnected
● Faulty control board
● Noise
● Check wiring to control board; Repair as needed
● Replace control board if necessary
31 E31 HI LEAK CURRENT
The control has detected high leakage
current (high voltege).
● Improper ground
● Faulty compressor
●Check ground screws/lugs and wiring; Repair/replace
if needed
● Check the compressor; Repair/replace if needed
32 E32 HI TEMP CTRL1
This error indicates the equipment is
experiencing high temperature faults on
the outdoor control board.
● Ambient air conditions too high
● Cooling bracket screw(s) missing or not
properly fastened (2-4 ton only)
● No or poor thermal grease coating between
coolin
g
plumbin
g
and coolin
g
bracket on control
board (2-4 ton only)
● Outdoor fan low speed (5 ton only)
● No flow or limited flow through control board
coolin
g
circuit
(
potential restriction in line or low
refrigerant) (2-4 ton only)
● Stop valve not completely open (2-4 ton only)
● Cycle power; re-try during usable ambient temperature
range
● Verify cooling bracket screws in place and secure;
Secure fasteners as needed (2-4 ton only)
● Check thermal
g
rease inside coolin
g
bracket on control
board; Apply additional grease as needed
● Check outdoor fan motor & wiring; Repair/replace if
needed (5 ton only)
● Check for restriction in line
● Check refrigerant charge level; Adjust if needed (2-4
ton only)
● Check the opening of stop valve, should be full open;
Repair/replace if needed (2-4 ton only)
33 - HI TEMP CTRL2
This error indicates the equipment is
experiencing high temperature faults on
the outdoor control board. Control has
determined continued operation is
acceptable. This indicates they may be a
problem with the equipment.
● Ambient air conditions too high
● Cooling bracket screw(s) missing or not
properly fastened (2-4 ton only)
● No or poor thermal grease coating between
coolin
g
plumbin
g
and coolin
g
bracket on control
board (2-4 ton only)
● Outdoor fan low speed (5 ton only)
● No flow or limited flow through control board
coolin
g
circuit
(
potential restriction in line or low
refrigerant) (2-4 ton only)
● Stop valve not completely open (2-4 ton only)
● Cycle power; re-try during usable ambient temperature
range
● Verif
y
coolin
g
bracket screws are in place and secure;
Secure fasteners as needed (2-4 ton only)
● Check thermal
g
rease inside coolin
g
bracket on control
board; Apply additional grease as needed
● Check outdoor fan motor & wiring; Repair/replace if
needed (5 ton only)
● Check for restriction in line
● Check refrigerant charge level; Adjust if needed (2-4
ton only)
● Check the opening of stop valve - it should be fully
open; Repair/replace if needed (2-4 ton only)
34 E34 CURRENT SPIKE
Board detected a high current condition.
This indicates the potential for a short
circuit.
● Current spike in supply
● Stop valve not completely open
● The compressor wire is lost phase
● Faulty control board
● Faulty compressor
● Check power supply for in-rush current during start-up
or steady state operation
● Check the opening of stop valve, should be full open;
Repair/replace if needed
● Check the wire between control board and compressor
● Replace control board if necessary
● Check the compressor; Repair/replace if needed

Amana AVZC20 Specifications

General

Brand	Amana
Model	AVZC20
Category	Heat Pump
Language	English