Rheem 310 Series Service Instructions Manual page 38

Fault Finding – Chart 4.6
4.6
Are
sensors T0 & T1
firmly plugged into
the correct
sockets?
YES
Ensure water in heat
pump is below 60ºC &
reset heat pump. To
reset heat pump switch
off, wait for 30 seconds
then switch back on.
Does
compressor start
or try to start after
Note: The
delay?
compressor starts 30
seconds after the
circulator.
NO
Test 12
Is 240V
present at the
compressor
terminals?
Note: Tests 12 & 13 must be
performed after waiting for the 30
second delay after starting of the
YES
circulator and cannot be performed
whilst the red LED is flashing.
Test 14
Are
the compressor
winding resistances
correct?
YES
Test 15
Is the
compressor
capacitor
working?
YES
Note: Refer to page 5 for T sensor plug socket location on control board.
TM025 Rheem Heat Pump Service Instructions REV: B
Date of Issue: 02/08/07
This document is stored and maintained electronically by
Note: T0 is heat exchanger water outlet sensor. T1
is heat exchanger water inlet sensor. This check is
performed in sequence 4 to ensure that the sealed
refrigerant system is operating (heating).
Test 5
Are
sensors T0 & T1
working?
YES
NO
NO
Red 5 flash
T0 - T1 < 8ºC in
sequence 4
NO
NO
Does red
LED immediately
go to 5 flash?
YES
Test 13
Is 240V
present at the control
board compressor
terminals?
NO
NO
NO
37
Service. All printed copies not bearing this statement in RED are deemed "uncontrolled".
Ensure sensors T0 & T1 are
plugged into correct sockets on
control board and that plug pins
on control board are clean and
free from conformal coating.
Replace faulty sensor(s)
YES Replace control board
8
YES Faulty compressor wiring.
Replace control board
Replace compressor
Replace compressor capacitor
Faulty compressor and/or
compressor capacitor wiring.