Rheem 310 Series Service Instructions Manual page 37

Fault Finding – Chart 4.5
4.5
Note: T3 is compressor discharge sensor. T4 is ambient air sensor. This check is performed in sequence 3 to
Are
sensors T3 & T4
firmly plugged into
the correct
sockets?
YES
sensors T3 & T4
Ensure water in heat
pump is below 60ºC &
reset heat pum p. To
reset heat pump switch
off, wait for 30 seconds
then switch back on.
Note: The compressor starts 30
Does
compressor start
or try to start after
delay?
NO
6VDC at the relay
YES
Is 240V
Test 12
present at the
compressor
terminals?
performed after waiting for the 30
second delay after starting of the
circulator and cannot be performed
YES
Test 14
Are
the compressor
winding resistances
correct?
YES
Test 15
Is the
compressor
capacitor
working?
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
ensure that the sealed refrigerant system is operating (heating).
Test 5
Are
working?
YES
NO
seconds after the circulator.
Test 9
Is there
NO
coil?
NO
Note: Tests 12 & 13 must be
whilst the red LED is flashing.
Red 4 flash
T3 is not > T4 +
º
15 C in sequence 3
NO
NO
Does red
LED immediately
go to 4 flash?
YES
Is the
relay plug plugged
in to the control
board?
YES
Is 240V
Test 13
present at the control
board compressor
terminals?
NO
NO
NO
YES
36
Service. All printed copies not bearing this statement in RED are deemed "uncontrolled".
Ensure sensors T3 & T4 are firmly
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
NO Plug in relay plug at control board.
Ensure plug pins are clean of
conformal coating and are making
contact. If plug & pins are ok
replace the control board.
YES Faulty compressor wiring.
Replace control board
Replace compressor
Replace compressor capacitor
Faulty compressor and/or
compressor capacitor wiring.