Lydall Affinity User Manual page 21

Problem
Unit does not Facility Water too warm
cool
(continued) Cooling load exceeds capacity of
unit
Refrigeration solenoid coil failure
Loss of refrigerant
Solid State Relay failure
Solenoid valve stuck shut
Defective refrigeration low pressure
cut-out
Malfunctioning thermal expansion
valve
Pump damaged, loss of flow
Hot gas bypass valve setting too
high
Hot gas bypass valve stuck open
Pump leaks Faulty pump casing
Shaft seal damaged
Pump housing O-Ring damaged
Improper fluid
Excessive Low voltage
noise on Start-
Up Wrong voltage taps used on
transformer
Contactor or coil failure
Possible Cause Possible Remedy
Provide cooler Facility Water
Reduce cooling load
Replace solenoid coil
Locate and repair leak, then
recharge with type and amount of
refrigerant specified on serial tag
Replace Solid State Relay
Repair or replace solenoid valve
Repair or replace low pressure cut-
out
Replace thermal expansion valve
Replace pump
Call Lydall
Repair or replace valve
Replace pump assembly
Replace shaft seal
Remove pump and rebuild
Call Lydall
Check electrical service to unit
Connect to proper taps
Replace contactor or coil