Lydall Affinity User Manual page 25

Problem
Compressor Discharge pressure too high
turns on and off
automatically Condenser fan(s) not on
Refrigeration high pressure cut-out
set to automatic
Temperature Loose wire
display reads
incorrectly
Broken RTD
Microprocessor failure
Microprocessor 5 second delay has not timed out
does not work
Microprocessor programmed
incorrectly
Microprocessor failure
O:MANUALS\D4207 (05/17/2002)
Possible Cause Possible Remedy
Check Facility Water for blockage
Check motor(s) and wiring
Check settings
Disconnect power to unit, then
check wiring
Replace RTD
Replace microprocessor
Wait at least 5 seconds after turning
on
Reprogram microprocessor - Call
Lydall
Replace microprocessor