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FAULT DIAGNOSIS FLOW CHART No.2
GLYCOL PUMP (HEAT DUMP)
No
Is header tank
glycol level
between max-min
marks?
Are the John
Guest shut off
valves open on
the pump?
Plug
pump
into
connection
Top up to maximum
level and check for
leaks
Go to Diagnostic
Chart No.3
Clear blockage or
restriction and
ensure tubing is the
correct type
Open shut off
valves
Internal wiring fault
Faulty pump motor
Is pump plugged
into its mating
connection?
Yes
No
Yes
Check for 240v
supply at
connection
Yes
No
No
Have the glycol
lines collapsed,
been restricted,
blocked or
secured together?
Ensure pipes are
not secured
together and away
from heat sources
Is the glycol
mixture
recirculating?
Faulty Pump
No
No
Yes
Yes
Is the glycol
mixture re-
circulating?
No
No
Yes
Yes
Does the pump
run?
Yes
