COMFORT CONTROL
2
SYSTEM™ CONTROL WIRING
22)) HHiigghh PPrreessssuurree CCoonnttrrooll LLoocckkoouutt
• If the HPC opens three (3) times during the same command for unit operation, the
ICC will lockout the compressor to keep it from continuing to operate and flash a
L” on the dual 7-segment LEDs followed by a “29”.
Active Protection – Code L29 – Open high pressure control
IIMMPPOORRTTAANNTT::
This mode of active protection must be manually reset.
33)) LLoocckkeedd RRoottoorr
• The ICC will display a flashing “L” followed by a flashing “04” when a locked rotor
condition occurs.
Active Protection – Code L4 – Locked rotor
If the ICC detects the compressor has run less than 15 seconds for four (4) con-
secutive starts during the same command for unit operation, the ICC will lockout
the compressor to keep it from continuing to operate and flash a “L” on the dual 7-
segment LEDs followed by a “04”.
IIMMPPOORRTTAANNTT::
This mode of active protection must be manually reset.
44)) CCoommpprreessssoorr PPrrootteeccttoorr TTrriipp
• If ICC detects a protector trip it will display a “P”. If protector doesn’t reset within 4
hours, the ICC display will change to “5”.
Compressor Protector – Code P – Protector Trip
55)) OOppeenn SSttaarrtt CCiirrccuuiitt LLoocckkoouutt
• The ICC will display a flashing “L” followed by a flashing “06” when an open start
circuit condition occurs.
Active Protection – Code L6 – Compressor open start circuit
If the ICC detects current in the run circuit without current present in the start cir-
cuit, , the ICC will lockout the compressor to keep it from continuing to operate
and flash a “L” on the dual 7-segment LEDs followed by a “06”.
IIMMPPOORRTTAANNTT::
This mode of active protection must be manually reset.
66)) OOppeenn RRuunn CCiirrccuuiitt LLoocckkoouutt
• The ICC will display a flashing “L” followed by a flashing “07” when an open start
circuit condition occurs.
Active Protection – Code L7 – Compressor open run circuit
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continuing to operate and flash a “L” on the 7-segment LEDs followed by a “21”. Once
t
he outdoor ambient rises above 5°F the ICC will clear active protection automatically.
IMPORTANT: This mode of active protection will automatically deactivate once the
outdoor temperature rises above 5°F. Wait until the outdoor ambient temperature rises
a
bove 5°F before performing further diagnostics.
2
)
High Pressure Control Lockout
• If the HPC opens three (3) times during the same command for unit operation, the ICC
will lockout the compressor to keep it from continuing to operate and flash a L” on the 7-
s
egment LEDs followed by a “29”.
Active Protection – Code L29 – Open high pressure control
IMPORTANT: This mode of active protection must be manually deactivated.
3) Locked Rotor
• The ICC will display a flashing “L” followed by a flashing “4” when a locked rotor
condition occurs.
Active Protection – Code L4 – Locked rotor
If the ICC detects the compressor has run less than 15 seconds for four (4) consecutive
starts during the same command for unit operation, the ICC will lockout the compressor
to keep it from continuing to operate and flash a “L” on the 7-segment LEDs followed by
a “4”.
IMPORTANT: This mode of active protection must be manually deactivated.
4) Open Start Circuit Lockout
6
c
ontinuing to operate and flash a “L” on the 7-segment LEDs followed by a “21”. Once
the outdoor ambient rises above 5°F the ICC will clear active protection automatically.
IMPORTANT: This mode of active protection will automatically deactivate once the
outdoor temperature rises above 5°F. Wait until the outdoor ambient temperature rises
above 5°F before performing further diagnostics.
2
)
High Pressure Control Lockout
• If the HPC opens three (3) times during the same command for unit operation, the ICC
will lockout the compressor to keep it from continuing to operate and flash a L” on the 7-
s
egment LEDs followed by a “29”.
Active Protection – Code L29 – Open high pressure control
IMPORTANT: This mode of active protection must be manually deactivated.
3) Locked Rotor
• The ICC will display a flashing “L” followed by a flashing “4” when a locked rotor
condition occurs.
Active Protection – Code L4 – Locked rotor
If the ICC detects the compressor has run less than 15 seconds for four (4) consecutive
starts during the same command for unit operation, the ICC will lockout the compressor
to keep it from continuing to operate and flash a “L” on the 7-segment LEDs followed by
a “4”.
IMPORTANT: This mode of active protection must be manually deactivated.
4) Open Start Circuit Lockout
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• The ICC will display a flashing “L” followed by a flashing “6” when an open start circuit
condition occurs.
Active Protection – Code L6 – Compressor open start circuit
If the ICC detects current in the run circuit without current present in the start circuit, ,
the ICC will lockout the compressor to keep it from continuing to operate and flash a “L”
on the 7-segment LEDs followed by a “6”.
IMPORTANT: This mode of active protection must be manually deactivated.
5) Open Run Circuit Lockout
• The ICC will display a flashing “L” followed by a flashing “7” when an open start circuit
condition occurs.
Active Protection – Code L7 – Compressor open run circuit
If the ICC detects current in the start circuit without current present in the run circuit, ,
the ICC will lockout the compressor to keep it from continuing to operate and flash a “L”
on the 7-segment LEDs followed by a “7”.
IMPORTANT: This mode of active protection must be manually deactivated.
Exiting Active Compressor Protection Lockout
Three are three methods to reset the ICC after an active protection lockout:
1) Cycle the line voltage to the unit
2) Cycle 24VAC to the ICC (remove the R or C connection to the ICC)
3) Push the TEST button down for one (1) second and release
Note: The ICC will attempt to start the unit when the TEST button is pressed and
released
Note: The preferred method of resetting the ICC is to push the TEST button down for one (1)
second.
7
• The ICC will display a flashing “L” followed by a flashing “6” when an open start circuit
condition occurs.
Active Protection – Code L6 – Compressor open start circuit
If the ICC detects current in the run circuit without current present in the start circuit, ,
the ICC will lockout the compressor to keep it from continuing to operate and flash a “L”
on the 7-segment LEDs followed by a “6”.
IMPORTANT: This mode of active protection must be manually deactivated.
5) Open Run Circuit Lockout
• The ICC will display a flashing “L” followed by a flashing “7” when an open start circuit
condition occurs.
Active Protection – Code L7 – Compressor open run circuit
If the ICC detects current in the start circuit without current present in the run circuit, ,
the ICC will lockout the compressor to keep it from continuing to operate and flash a “L”
on the 7-segment LEDs followed by a “7”.
IMPORTANT: This mode of active protection must be manually deactivated.
Exiting Active Compressor Protection Lockout
Three are three methods to reset the ICC after an active protection lockout:
1) Cycle the line voltage to the unit
2) Cycle 24VAC to the ICC (remove the R or C connection to the ICC)
3) Push the TEST button down for one (1) second and release
Note: The ICC will attempt to start the unit when the TEST button is pressed and
released
Note: The preferred method of resetting the ICC is to push the TEST button down for one (1)
second.
3
Lower case “c” indicates first stage cooling operation
2) Second Stage Cooling Operation – When the ICC receives a command for second stage
cooling operation, an upper case “C” is displayed on the 7-segment LEDs.
Upper case “C” indicates second stage cooling operation
3) First Stage Heating Operation - When the ICC receives a command for first stage
heating operation, “h1” is displayed on the 7-segment LEDs.
“h1” indicates first stage heating operation
4) Second Stage Heating Operation - When the ICC receives a command for second stage
heating operation, “h2” is displayed on the 7-segment LEDs.
“h2” indicates second stage heating operation
5) Defrost Operation – When the ICC starts a defrost cycle, a lower case “d” is displayed
on the 7-segment LEDs.
Lower case “d” indicates defrost operation (in heating mode)
3-minute Anti-short Cycle Timer
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