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FAULT DIAGNOSIS FLOW CHART No.3
HEAT DUMP
Is the radiator
matrix blocked,
restricting air-
flow?
Change transformer
Is the heat dump
connected to
unit?
Check for 24v
supply at heat
dump
Yes
No
Is the heat dump
fan running?
Plug
heat
dump
connection
into
socket
Check outlet
socket on base
unit for 24 volts
Clean
radiator
matrix
Replace Fan Motor
Heat dump is sited in full
sunlight or near other
sources of
heat without
adequate ventilation
Re-site heat dump
Wiring fault
between base unit
and heat dump
Check if fuses in
transformer have
blown
Replace Fuses
Check for wiring
fault before
restarting unit
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
