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8-8
TROUBLESHOOTING
Symptom: High discharge pressure (check gage accuracy)
Insufficient water flow through the cooling
tower or condenser
Fan control out of adjustment
Non-condensable in system.
Cooling tower or evap condenser in need of
maintenance
Dirty condenser tubes
Too much liquid in condenser/receiver
covering tubes causing inefficiency
12/17/12
Possible Cause
Possible Remedy
Check the condenser water pump to make sure
it is pumping enough water as specified in
TABLE 3-2. Check sump strainer screen and
clean.
Check condenser pump direction of
rotation.
Check adjustment. Refer to FIGURE 9-3, "Fan
Control". Replace if defective.
If non-condensables are present with the
refrigerant, the saturated temperature will not
relate to the pressure reading at the receiver.
The refrigerant will be cooler, although the
pressure will be high. Air can be purged from
the system by following instructions in Section
9, "Purging Non-Condensables".
Check fan motor and fan belts for proper
operation and tension. Check spray nozzles,
tubes,
sump,
and
accumulation of mineral deposit and clean as
required.
Check tower blowdown and
chemical treatment if applicable.
Visually inspect the condenser tubes to see if
there is any build-up of mineral deposit which
would reduce the cooling effect of the tubes
and water. Clean chemically or mechanically
as applicable.
Remove refrigerant so all tubes will be above
liquid refrigerant level.
P24A & P34A Service Manual
sump
screen,
for
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