Hayward SUM5TA - Common Error Codes: Defrost Sensors; dPO;cOP Defrost Sensor Error; Troubleshooting dPO;cOP; dPc;cSH Defrost Sensor Error

Common Error Codes
dPO
cOP
HeatPro Display
Summit Display
dPO/cOP on Display
dPO or cOP is an indication of an open defrost
temperature sensor.
Summit style heat pumps use a 4.8k ohm sensor,
and HeatPro heat pumps use a 10k ohm sensor..
Troubleshooting dPO/cOP
The most common cause of dPO or cOP error code is an open defrost temperature sensor.
Check sensor wiring for breaks, and check sensor resistance against the correct
temperature/resistance chart located on page 11.
If resistance is infinite or very high according to the chart replace the sensor.
If sensor reads the correct resistance for the temperature of the water, replace control board
dPc/cSH on Display
Pc or SH is an indication of an shorted water
temperature sensor.
Summit style heat pumps use a 4.8k ohm sensor,
and HeatPro heat pumps use a 10k ohm sensor.
cSH
HeatPro Display
dPc
Summit Display
Troubleshooting dPc/cSH
The most common cause of Pc or SH error code is a shorted defrost temperature sensor.
Check sensor wiring for shorted wires, and check sensor resistance against the correct
temperature/resistance chart located on the page11.
If resistance is 0 or very low according to the chart, replace the sensor.
If sensor reads the correct resistance for the temperature of the water, replace control board