35
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 4, 4.1 & 4.2 (Proxy Display required 703 series or use Chart 4a)
4
NO
Is the fuse blown at
the switchboard?
YES
Did the fuse blow
again?
YES
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.
YESNO
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?
Refer to fault finding chart for
error code displayed.
YES
(1) Refer to section on ‘Timer”
Is water supply
to BWU ok?
NO
Is high level probe
insulation correct length?
Replace level probe.
NO
Are all plugs & sockets
firmly connected?
NO
Does water flow freely
from tap past model
capacity?
Normal operation. If original fault
was for error code J and error
code J is still displayed then
replace control board.
YES
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.
Notes:
(1) 701, 702 & 703 Series BWU’s do not use a
Chiller, therefore error code B will always be
displayed. This is normal operation.
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.
Is 240 volts present
at inlet solenoid?
(TEST 8)
Replace control board.NO
Is BWU inlet
strainer
blocked?
Clean or replace inlet strainer.YES
Check for blockage or restriction
in pipe work, inlet solenoid valve
(including flow regulator) or
BWU tap.
NO
Replace fuse
NO
YES
YES
YES
NO
YES
YES
YES
NO
YES
YES
NO
NO
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