32
CONVENTIONAL THERMOST
A
T WIRING
Flashing upper case C
A call for second stage cooling has be received
• The 3-minute time delay can be bypassed when a call for compressor operation is
present by pressing the TEST button for 1 second and releasing. The compressor
will begin operation and the dual 7-segment will stop flashing.
30 Second Minimum Run Timer
• The ICC has a built in 30 second minimum unit run time. If a call for compressor
operation is received by the ICC and the call is removed, the compressor will con-
tinue to operate for 30 seconds. The dual 7-segment LEDs will flash “c” or “C”
while the minimum run timer is active.
1 Second Compressor/Fan Delay
• The ICC starts/stops the outdoor fan one (1) second after the start/stop of the
compressor upon a call for compressor operation to minimize current inrush
and/or voltage drop.
12.12 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:
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 call 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”.
IMPORTANT: This mode of active protection must be manually reset.
L
2 I
C
