Temperature rises above max
setpoint
Room is too hot. Check sensor
and reset alarm after fixing the
problem.
Temperature drops below min
setpoint
Room is too cold. Check sensor
and reset alarm after fixing the
problem.
Humidity rises above max
setpoint
Too much moisture in the air.
Check and reset the alarm after
fixing the problem.
Humidity drops below min
setpoint
Room is too dry. Check and
reset the alarm after rectify the
problem.
Check motor, duct work, and
filter. Reset the alarm after
rectifying the problem.
Check and recalibrate the
switch if necessary. Consult the
electrical wiring for more detail.
Check and replace filter if
necessary
Check the dirty air filter switch
and recalibrate the sensitivity
level if necessary. Consult the
electrical wiring for more detail.
Refrigerant pressure rises above
limit
Check the high head pressure
and reset the alarm after a
manual reset on the pressure
switch.
Refrigerant pressure drops
below limit
Check for low pressure switch.
Change low pressure bypass
time out and reset the alarm
after rectifying the problem.
Compressors short cycling
Compress ON/OFF too frequent
Check discharge and return air
temperature. Adjust
compressor Max ON if needed.
Check if heater is overloading.
Check and reset alarm after
rectifying the problem
Verify setting under
“Technician->DI Setup->Heater
Overheat” Alarm IF=Closed