3300 SSeeccoonndd MMiinniimmuumm RRuunn TTiimmeerr
• The ICC has a built in 30 second minimum unit run time. If a command for com-
pressor operation is received by the ICC and the command is removed, the com-
pressor will continue to operate for 30 seconds. The dual 7-segment LEDs will
flash “c” or “C” while the minimum run timer is active.
11 SSeeccoonndd CCoommpprreessssoorr//FFaann DDeellaayy
• The ICC starts/stops the outdoor fan one (1) second after the start/stop of the
compressor upon a command for compressor operation to minimize current
inrush and/or voltage drop.
12.5 Active Compressor Protection Mode
• The ICC actively protects the compressor from harmful operation during a fault
condition.
• When the ICC detects a condition that could damage the compressor, the ICC will
enter active protection mode and lockout compressor operation
• The condition causing active protection must be resolved then the ICC can be
reset to restart the system.
• There are five (5) active protection modes:
11)) LLooww PPrreessssuurree CCoonnttrrooll LLoocckkoouutt
• The ICC will display a flashing “L” followed by a flashing 21 when a low pressure
control lockout occurs.
• The ICC addresses low pressure control faults differently depending on the mode
of unit operation (cooling or heating mode).
Active Protection – Code L21 – Open low pressure control
CCoooolliinngg MMooddee
• If the LPC opens three (3) times during the same command for cooling 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 “21”.
IIMMPPOORRTTAANNTT::
This mode of active protection must be manually reset.
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.
22
COMFORT CONTROL
2
SYSTEM™ CONTROL WIRING
5
• The ICC actively protects the compressor from harmful operation during a fault condition.
• When the ICC detects a condition that could damage the compressor, the ICC will enter
active protection mode and lockout compressor operation
• The condition causing active protection must be resolved then the ICC can be reset to restart
the system.
• There are five (5) active protection modes:
1) Low Pressure Control Lockout
• The ICC will display a flashing “L” followed by a flashing 21 when a low pressure
control lockout occurs.
• The ICC addresses low pressure control faults differently depending on the mode of unit
operation (cooling or heating mode).
Active Protection – Code L21 – Open low pressure control
Cooling Mode
• If the LPC opens three (3) times during the same command for cooling 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 “21”.
IMPORTANT: This mode of active protection must be manually deactivated.
Heating Mode
• There are two scenarios that will cause active protection during a LPC trip when the unit
is in the heating mode:
Active Protection with hard lockout:
If the LPC opens three (3) times within 120 minutes for the same command for heating
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 “21”.
IMPORTANT: This mode of active protection must be manually deactivated.
Active Protection with soft lockout:
If the LPC opens three (3) times for the same command for heating and the outdoor
ambient temperature is below 5°F, the ICC will lockout the compressor to keep it from
6
continuing 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-
segment 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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