11.2 Troubleshooting error messages
ERRORMESSAGES
Code Error Description Fix / Comment
P01 Inlet temperature sensor fault Check inlet temperature sensor for open line
or short
P02 Outlet temperature sensor fault Check outlet temperature sensor for open line
or short
P032 Hot water temperature sensor fault Check hot water temperature sensor for open
line or short
P04 AT sensor fault Check temperature sensor for open line or
short
P153 Coil sensor fault Check coil temperature sensor for open line or
short
P17 Suction temperature sensor fault Check AI/DI 05 temperature sensor for open
line or short
P181 Exhaust temperature sensor fault Check exhaust temperature sensor for open
line or short
P182 Exhaust overtemp fault Check compressor for high outlet temperature.
PP1 High side pressure sensor fault Check high side pressure sensor for open line
or short
PP2 Suction pressure sensor fault Check low side pressure sensor for open line
or short
P001 Inlet EVItemperature sensor fault Check inlet EVI temperature sensor for open
line or short
P002 Outlet EVItemperature sensor fault Check outlet EVI temperature sensor for open
line or short
TP Low ambient temperature
protection
Ambient temperature sensor is reading below -
13°F /-25°C
E032 Flow switch protection Check water level and pump operation
E04 Electric overheat protection Electric heater has a time-based thermal limit
E051 Compressor overcurrent shutdown
fault
Check compressor for excessive amperage
draw.
E08 Communication fault Check wire connector between touchscreen
controller and main board
E081 Fan communication fault Check wire connector between main board
and fan speed control board
E11 High pressure protection Monitor operating pressure and check
pressure switch safety circuit
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