Rheem 325 II Series Service Instructions Manual page 47

Fault Finding: Chart 11.11
11.11
Compressor Troubleshooting
Has the refrigerant high pressure
switch tripped?
TEST 15
NO
Is 240 volts present at the
compressor terminals?
TEST 16
YES
Are the compressor motor
winding resistances correct?
TEST 18
YES
Is the compressor capacitor
working?
TEST 19
YES
TM077: 325 & 410 Series II Heat Pump Service Instructions
Rev 00: Issued April 2014
This document is stored and maintained electronically by
NOTES
1. The reset button will reset Fault 9, reset the Fault 9 counter and clear the stored
Fault Code from the controller memory.
2. Fault 9 will not disable all heating unless it has occurred 3 consecutive times.
3. If Fault 9 has occurred, the refrigerant high pressure switch may also have tripped.
Reset the refrigerant high pressure
YES
switch.
Is 240V present at the
NO compressor plug?
TEST 17
NO
Compressor internal overload switch
may have opened.
NO
Wait 15 minutes for the overload
switch to cool and auto-reset.
Are the compressor motor
winding resistances correct?
TEST 18
YES
Reset the heat pump using the reset
button, and use the proxy sensor or
draw off water to initiate a call for
heating.
Allow the system to run until the
compressor internal overload switch
trips again.
Is the compressor casing
temperature greater than 110°C?
YES
NO
YES
NO
NO
Service. All printed copies are deemed uncontrolled.
9
Repair or replace the faulty
compressor wiring.
Replace the controller.
Replace the compressor.
9
Replace the controller.
9
47