Diagnostic Codes - Rinnai REHP Series Installation And Operation Manual

Figure 27
Table 13
•
Diagnostic codes start with "E" (i.e. EH0b) are audible (Shows error code and makes
beeping noise until resolved).
•
Diagnostic codes start with "P" (i.e. PH15) are not audible (Only shows error code icon on
the display).
Display Action
Unit
EH0b
Lockout
Unit
EH00
Lockout
Unit
EH03
Lockout
Unit
PH15
Lockout
Unit
EC54
Lockout
If both T3
and TH
fail, ONLY
EH5H
heat
pump
stops
Rinnai Electric Heat Pump Water Heater Manual
Malfunction Description
Controller to PCB
communication error
(controller stops working/
malfunction)
Machine working parameters
are abnormal.
Fan motor fault
Electric current leakage
(If PCB current difference
between L,N >14mA)
Compressor discharge
temperature sensor (TP)
failure.
Compressor suction
temperature sensor (TH)
failure.
Error code icon
High Temp. Alert (if applies)
Diagnostic code
Corrective action
1. Power cycle the unit.
2. Turn off electrical power at breaker.
3. Disconnect and reconnect controller
cable to controller.
4. Disconnect and reconnect CN53
connector on the main PCB.
5. If the error persists, contact a qualified
person to replace controller.
1. Power cycle the unit.
2. If the error persists, contact a qualified
person to replace main PCB.
1. Power cycle the unit.
2. Turn off electrical power at breaker.
3. Disconnect and reconnect CN12
connector on the main PCB.
4. Inspect wire for damage.
5. If the error persists, contact a qualified
person to replace fan motor.
1. Power cycle the unit.
2. Turn off electrical power at breaker.
3. Check all connections on the main PCB.
4. If the error persists, contact a qualified
person to replace main PCB.
1. Turn off electrical power at breaker.
2. Disconnect and reconnect CN28
connector on the main PCB.
3. Inspect wire for damage.
4. If the error persists, contact a qualifies
person to replace temperature sensor.
1. Turn off electrical power at breaker.
2. Disconnect and reconnect CN29
connector on the main PCB.
3. Inspect wire for damage.
4. If the error persists, contact a qualified
person to replace temperature sensor.
39