Rheem 325 II Series Service Instructions Manual page 46

Fault Finding: Chart 11.10
11.10
Water Flow Troubleshooting
Use the proxy sensor or draw off water
to initiate a call for heating.
Is the circulator operating?
Circulator operation can be
determined by feeling the body
of the circulator for vibration.
YES
Where installed, is the
cold water ball valve
on the storage tank open?
YES
Where installed, is the hot water
check valve on the storage tank
installed in the correct direction?
YES
Is the circulator water flow
direction correct?
YES
Is the circulator impeller
functioning?
YES
Is there an air lock in the water
system?
NO
There is a blockage or restriction in
the water system.
TM077: 325 & 410 Series II Heat Pump Service Instructions
Rev 00: Issued April 2014
This document is stored and maintained electronically by
Is 240 volts present at the
NO circulator plug?
TEST 13
YES
Is the circulator motor winding
resistance correct?
TEST 14
NO
NO
NO
NO
NO
YES
Connect the fan wiring or plug firmly
NO
and making firm electrical contact. If
the pins are OK, replace the controller.
YES
Reinstall the check valve so the water
Bleed the air out of the water system
from the hot water flexible hose union
Clear the blockage or restriction in the
In poor water quality areas, descaling
Service. All printed copies are deemed uncontrolled.
and correctly to the controller.
NO
Is the circulator plug firmly and
correctly connected to the
controller?
YES
Ensure that the plug pins are clean
Check the circulator impeller for
restriction or seizure.
Replace the circulator.
Open the ball valve.
flow is directed towards the storage
tank.
Reinstall the circulator so the water
flow is directed towards the heat
exchanger.
Replace the circulator.
at the storage tank.
water system – flexible hoses
(including kinks), circulator, heat
exchanger and tank fittings.
may be required.
46