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19
FAULT DIAGNOSIS FLOW CHART
HEAT DUMP (WATER COOLED UNITS)
Is heat dump
fan running
Check for 24v
supply at the
socket on the
glycol module
Check for 24v
output at
transformer in
glycol module
Check for 240V on
input to
transformer
Internal wiring
fault between
transformer
and socket
Replace fan
motor
Clean radiator
matrix
Is the heat dump
sited in full sunlight or
near other heat
sources without
adequate ventilation
Re site heat
dump
Is the
condenser
matrix blocked
with debris
Is there 24V at
the heat dump
No
Yes
NO
Broken wire
betweenglycol
module and
heat dump
Yes
No
Yes
Replace
transformer
Yes
Internal wiring fault
or power supply
problem from base
unit
No
Yes
Yes
No
Yes
Is the glycol
recirculating
adequately
Refer to
Glycol Pump
fault guide
No
No