Fault Finding Chart 1 - Rheem 70103 Service Instructions Manual

Fault Finding Chart 1 (Proxy timer recommended for fault finding on 703 series)
1
Is 240 volts present
at the power point?
(TEST 1)
YES
Test 2A for 3 – 15L models
Test 2B for 25 & 40L models
Is 240 volts present
at terminal block?
(TEST 2A or 2B)
YES
Test 3A for 3 – 15L models
Test 3B for 25 & 40L models
Is 240 volts present
at control board?
(TEST 3A or 3B)
YES
Refer to section
Does timer display an
error code other than
error code B?
701,702 & 703 Series BWU's do not use a Chiller,
therefore error code B will always be displayed. This
NO
Is complaint for no or
low water flow?
NO
Refer to section on 'Testing the
Is BW thermistor ok?
YES
Is BW thermistor
wiring connector ok?
YES
Is BW thermistor
Firmly plugged into
control board?
TM063 701, 702 & 703 Series Boiling Water Unit Service Instructions
Revision D: Feb 2017
This document is stored and maintained electronically by
Is the fuse blown at
NO
the switchboard?
NO
on 'Timer"
is normal operation.
Boiling Water Thermistor'.
YES
Service. All printed copies not bearing this statement in RED are deemed "uncontrolled"
YES Replace Fuse
Did the fuse blow
again?
NO
Is 240 volts present
at the power point?
(TEST 1)
NO
NO
NO
YES
YES
NO
NO
NO
Chart 1.2 is part of and can
be located within Error code
L fault finding chart.
1.1
YES
Faulty fuse replaced. Check
YES
appliance operation.
Household wiring or power point
faulty. Advise customer to call
an electrician.
Replace faulty cord set.
Repair O/C wiring.
Refer to fault finding chart for
error code displayed.
4.1
Chart 4.1 is part of and can
be located within chart 4
Replace BW thermistor.
Ensure connector plug & socket
is firmly connected. Replace
connector if necessary.
Ensure BW thermistor is firmly
plugged into correct socket on
control board.
Note if 703 Series,
with no proxy timer
1.2
display, go to Fault
Finding Chart 1.1a,
on following page
32