54
Troubleshooting Chart (continued)
Symptom
Cause
Solution
The Purge Display reads:
Drain Fault
Drain Solenoid Valve (L3) is defective
Purge tank level switch (LS1) is
defective.
Valve in drain-back line is closed
Circuit Board "Drain" Relay (RY3) is
defective
Repair or replace the valve.
Replace the level switch.
Open the valve.
Replace the Circuit Board.
Purge Unit "OFF" in a Fault
Condition, but front panel fault light is
not ON.
Fault Light is defective.
Replace Keypad.
Purge Fails to pumpout non-
condensables when chiller is
operating.
Depending upon the type of chiller and
operating conditions, air may be logged
up in the condenser away from the
purge vapor take-off location.
Operate purge in “Adaptive” mode. If
it is functioning properly, air in the
chiller will be removed.
Purge fails to remove non-
condensables, chiller head pressure
excessive
Purge may be malfunctioning.
Refer to "Refrigeration System
Diagnostic Procedure" on page 55
Purge operation continues after
chiller cycles OFF.
Purge set in the "ON" mode.
Purge in "Adaptive" Mode
Normal "Chiller off" cycle operation.
No refrigerant level visible in purge
tank sight glass.
Purge OFF in a drain back equalization
cycle
Liquid refrigerant may evaporate back to
chiller during prolonged chiller OFF
periods, or when the purge is OFF.
Liquid Drain Solenoid Valve (L3) failed
open.
Circuit Board Drain relay (RY3) contacts
are welded closed.
Condition normal
Liquid should return within 5 minutes
of continuous purge operation.
Repair or replace the valve.
Replace the Circuit Board.
Refrigerant level remains above sight
glass and the drain cycle fails to
initiate.
Liquid Level Switch (LS1) is defective.
Replace the Liquid Level Switch.
Free standing water is visible in the
purge tank sight glass.
Filter-Drier may be saturated with
moisture.
Drain water from purge tank and
replace Filter-Drier.
Liquid Drain Solenoid Valve (L3)
cycles too often
Drain Cycle Time is set for to too short
of a drain time.
Set Drain Cycle setting to a longer
drain time. (see "Setting parameters
starting on page 26)
Pumpout Compressor (C2) hot to the
touch and will not start
One or both of the pumpout solenoid
valves (L4 & L5 ) failed to open
Flow Restrictor (FR) blocked
Repair or replace defective valves or
coils.
Replace Flow Restrictor
Содержание Redi-Purge PRG-113-C3
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