Rheem 310 Series Service Instructions Manual page 39

Fault Finding – Chart 4.7
4.7
Is the
circulator water
flow direction
correct?
YES
Is the
sensor strip & sensor
T1 firmly plugged into
the correct
sockets?
YES
Test 5
Is
sensor T1
working?
YES
Test 4
Is
sensor strip
working?
YES
Is there
an air lock
in the water
system?
NO
Has the
cold water dropper
tube fallen off?
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: T1 is heat exchanger water inlet sensor. S4 is thermistor sensor strip sensor.
This check is performed in sequence 3 or 4 to ensure that the circulator is operating.
Service. All printed copies not bearing this statement in RED are deemed "uncontrolled".
Red 6 flash
T1 > S4 + 7ºC in
sequence 3 or 4
NO
NO
NO
NO
YES
YES
NO
38
Reinstall circulator so as flow is
directed towards heat exchanger.
Ensure sensor strip & sensor T1
are both firmly plugged into the
correct sockets on control board
and that plug pins on control
board are clean and free from
conformal coating.
Replace sensor T1
Replace sensor strip
Bleed air from water system at
water outlet flexible hose union.
Warning! Ensure water escaping
from flexible hose is caught in a
container and does not escape or
sensor strip damage may occur.
Replace cold water dropper tube.
Replace control board.