Rheem 310 Series Service Instructions Manual page 18

Fault Finding Chart 1.1
1.1
Test 2
Are the
thermostat contacts
closed?
YES
control board &
YES
Reset heat pump &
pump switch power off,
wait five minutes
before progressing
then switch back on.
from this point.
Note: Ensure you
wait the full five
minutes before
progressing from
this point.
Is the
compressor
running?
YES
To check if the refrigeration system is
heating feel the braided flexible hose
from the heat exchanger water outlet.
Is the
refrigeration
system
heating?
YES
evaporator fan
operating?
Note: For more information on LED indication refer to pages 12 and13.
TM025 Rheem Heat Pump Service Instructions REV: B
Date of Issue: 02/08/07
This document is stored and maintained electronically by
Is there
Test 3
240V at the
relay?
Note: To reset heat
wait for 30 seconds
Red solid or Red and
Green LED's indicating
simultaneously
No indication
What is the
status of the
Red flashing
control boards
LED's five
minutes after
resetting? Green solid
Green flashing
NO
NO
Is the
Is
YES the air flow
obstructed?
No Hot Water
NO
NO
What is the
Test 4
Is the
sensor strip
working?
YES
Test 5
Is
sensor T3
working?
YES
NO
YES
System working ok. The element circuit should be
checked as a temporary condition may have caused the
NO appliance to enter boost mode. If in boost mode and the
element circuit is not operational the cylinder water will
be cold and the system cannot reset itself automatically.
17
Service. All printed copies not bearing this statement in RED are deemed "uncontrolled".
Replace thermostat.
Wiring incorrect.
Check control board wiring loom
plug (lower thermostat to control
board wiring loom).
HPV 4.0 or higher
controller
software
HPV 3.1, HPV 3.2 or
version?
no HPV identification
Replace control board.
NO Replace sensor strip.
NO Replace sensor T3.
Replace control board.
Replace control board (system
should have been operating in
boost mode after five minutes
from resetting) then check
system operation as a second
fault may be present.
Remove obstruction or clean
evaporator.
1.2
1.2
3.6