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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 5 (Proxy Display required for 703 series or use chart 5a)
5
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 or 2B)
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
Test 2B for 25 & 40L models
Replace faulty cord set.
Is 240 volts present
at control board?
(TEST 3A or 3B)
Repair O/C wiring.NO
Test 3A for 3 – 15L models
Test 3B for 25 & 40L models
Does timer display an
error code other than
error code B?
YES
Refer to fault finding chart for
error code displayed.
YES
Refer to section
on ‘Timer”
Does timer
display work?
(proxy timer display
703 series)
NO
NO
YES
YES
701, 702 & 703 Series BWU’s do not use a Chiller, therefore error
code B will always be displayed. This is normal operation.
Are timer ribbon
cables firmly
connected?
Replace timer.YES
Ensure timer ribbon cables are
firmly plugged into sockets on
rear of timer and socket on
control board.
NO
Do all timer functions
operate?
Refer to section
on ‘Timer”
Are timer ribbon
cables firmly
connected?
NONO
Has timer been
operated and/or
programmed
correctly?
YES
Advise customer on timer
operation and/or how to
program timer.
NO
Replace timer.YES
Timer ok.YES
Refer to section
on ‘Timer”
Replace fuse
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