Rheem RTGH-RH11DV - Chapter 4: Troubleshooting - Inlet Temperature Sensing; Er:31 DHW Inlet Thermistor Error

60
Errorcode Meaning Condition
DHWInletThermistorOpen
orShortCircuit
(Automaticrestore)
WhennoresponseatDHW In-
letThermistor,errorcode31will
appear.
Failureevent
When DHWInletThermistor’swiringlinelocatedatDHWInletconnectionisdisconnected.
Checkpoint
①VerifythattheDHWInletThermistorisproperlysecured
inthecoldwaterconnection.Verifyproperconnectionof
theDHWInletThermistor'swiringtothecircuitboard.
(CN7:blue
④
,blue
⑪
)
②MeasureresistanceacrosstheDHWInlet
Thermistorwithamulti-meter.Ifthemulti-meter
displays0Ω(shortcircuit),replacetheDHWInlet
Thermistor.
Chapter4Troubleshooting
DHWInlet(blue/blue)