Lydall Affinity User Manual page 22

Problem
Pump motor Pump overload protection set too
overheats high
Improper voltage supplied
Noisy Flooding of refrigerant into
compressor crankcase
Worn compressor
Refrigeration high pressure cut-out
set too high
Refrigeration low pressure cut-out
set too low
Level light Low coolant level
remains on
Reservoir level switch float stuck
Time delay relay malfunction (when
used)
Level switch failure
Fault light Low coolant flow
remains on
No coolant flow
Flow switch sticking
Level light does Time delay relay has not timed out
not work (when used)
Lamp burned out
Level switch failure
Possible Cause Possible Remedy
Reset pump thermal overload relay,
or replace if faulty
Correct voltage
Warm crankcase if unit has been off
for a long period or has been left in
a cool ambient for more than a few
hours
Replace compressor - Call Lydall
Adjust setting
Adjust setting
Check for leaks, then fill reservoir
Clean reservoir and level switch
Replace time delay relay
Replace level switch
See Problem; Low coolant flow
See Problem; No coolant flow
Disassemble flow switch, clean and
reinstall, or replace
Wait for time delay relay to time out
Replace lamp
Replace level switch