Rheem 310 Series Service Instructions Manual page 28

Fault Finding – Chart 3.4
System in boost or limp mode - Software version HPV 3.1, HPV 3.2 or no HPV
3.4
Test 9
Is there
6VDC at the relay
coil?
YES
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
circulator and cannot be performed
YES
whilst the red LED is flashing.
Test 14
Are
the compressor
winding resistances
correct?
YES
Test 15
Is the
compressor
capacitor
working?
TM025 Rheem Heat Pump Service Instructions REV: B
Date of Issue: 02/08/07
This document is stored and maintained electronically by
Is the
relay plug plugged
NO
into the control
board?
Is 240V
present at the control
NO
board compressor
terminals?
Compressor internal ECO
may have tripped open
circuiting the compressor
NO
windings. Wait ten
minutes for ECO to cool
and auto reset.
Are
the compressor
winding resistances
correct?
YES
Reset heat pump and run
system until compressor
ECO trips again.
Is the
compressor
temperature 150ºC
or hotter?
NO
YES
Service. All printed copies not bearing this statement in RED are deemed "uncontrolled".
identification
NO
YES
Test 13
YES
NO
Note: Compressor internal
ECO is auto trip & auto
reset & is not a replaceable
component.
ECO Opens @ 150ºC
ECO Closes @ 90ºC
Test 14
Note: To reset heat
pump switch power off,
wait for 30 seconds
then switch back on.
YES
27
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.
Faulty compressor wiring.
Replace control board
NO
Replace compressor
NO
8.3
Replace compressor capacitor
Faulty compressor and/or
compressor capacitor wiring.