Lydall Affinity User Manual page 20

Problem
Unit does not No power to unit, breaker tripped
start
Low voltage
Wrong phase sequence
Refrigeration high pressure cut-out
tripped
Loose wire
Defective contactor or coil
Loss of refrigerant
Compressor damaged
Unit does not Compressor internal thermostat
cool tripped
Compressor damaged
Evaporator damaged
Microprocessor failure
Facility Water control valve set too
low
Microprocessor programmed
incorrectly
Insufficient flow of Facility Water
Trouble Shooting Guide
Possible Cause Possible Remedy
Verify correct power is applied,
close breaker after correcting fault
Check electrical service to unit
Check phase reverse relay or phase
monitor. If sequence is incorrect,
switch any 2 wires on the incoming
power source
Manually reset button on pressure
switch after correcting fault
Disconnect power, then check
wiring
Repair or replace contactor or coil
Locate and repair leak, then
recharge with type and amount of
refrigerant specified on serial tag
Replace compressor - Call Lydall
Allow time for compressor to cool
and automatically reset
Replace compressor - Call Lydall
Call Lydall
Replace microprocessor
Reset Facility Water control valve -
Call Lydall
Reprogram microprocessor - Call
Lydall
Increase flow of Facility Water