Hayward HeatPro HP50TA Troubleshooting Manual page 30

SH/Pc
Check for shorted wires from
water temperature sensor to
control board or interface board
Wiring OK?
NO
Correct wiring
cSH/dPc
Check for shorted wires from
coil temperature sensor to
control board or interface board
Wiring OK?
NO
Correct wiring
Flow Chart
YES
Water Sensor failure.
Check sensor with values in
If values are not correct, replace
sensor. If values are correct,
replace control board
Flow Chart
YES
Coil Sensor failure.
Check sensor with values in
If values are not correct, replace
sensor. If values are correct,
replace control board
OP/PO – SH/Pc
Chart pg. 11.
cOP/dPO – cSH/dPc
Chart pg. 11.
OP/PO
Check for loose wires from water
YES
temperature sensor to control
board or interface board
Wiring OK?
Correct wiring
cOP/dPO
Check for loose wires from coil
YES
temperature sensor to control
board or interface board
Wiring OK?
Correct wiring
NO
NO