Rheem 70103 - Fault Finding Chart 4 a, incl. (4.1 & 4.2) 703 Series

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TM063 701, 702 & 703 Series Boiling Water Unit Service Instructions
Revision D: Feb 2017
This document is stored and maintained electronically by Service. All printed copies not bearing this statement in RED are deemed “uncontrolled”
Fault Finding Chart 4a, incl. (4.1 & 4.2) 703 Series – No Proxy Display Timer
4
NO
Is the fuse blown at
the switchboard?
NO
YES
Did the fuse blow
again?
YES
NO
Is 240 volts present
at terminal block?
(TEST 2A)
Household wiring or power
point faulty. Advise customer to
call an electrician.
NO
Is 240 volts present
at the power point?
(TEST 1)
1.1
Is 240 volts present
at the power point?
(TEST 1)
Faulty fuse replaced. Check
appliance operation.
YES
NO
YES
Test 2A for 3 – 15L models
Replace faulty cord set.
Is 240 volts present
at control board?
(TEST 3A)
Repair O/C wiring.NO
Test 3A for 3 – 15L models
YES
Replace Element
NO
Is water supply
to BWU ok?
YES
NO
Is high level probe
insulation correct
length?
YES
Replace level probe.
NO
Are all plugs
& sockets firmly
connected?
YES
NO
YES
Does water flow
freely from tap past
model capacity?
YES
NO
4.1
Restore water supply to BWU.
Ensure stop cock or isolation
valve is open. If an additional
water filter is installed check to
ensure it is not blocked.
4.2
Firmly reconnect plug socket(s).
i.e. can 4L be drawn
from a 3L model?
Is inlet solenoid
resistance correct?
(TEST 7)
Replace inlet solenoid valve.
NO
Is 240 volts present
at inlet solenoid?
(TEST 8)
YES
Replace control board.NO
Is BWU inlet
strainer
blocked?
YES
Clean or replace inlet strainer.YES
Check for blockage or
restriction in pipe work, inlet
solenoid valve (including flow
regulator) or BWU tap.
NO
YES
Is there continuity across
ECO, and correct resistance
on the element?
(TEST 5 & 6A)
4a
Replace fuse
Normal operation. If original
fault was for error code J and
error code J is still displayed
then replace control board.
(TEST 5A & 6A)