Technical information

PLC CONTROL ALARM E
RRORS
Alarm Message Description
Flow Fault
Low Suction Pressure
High Discharge Pressure
Process Pump Overload
High Temperature Safety
Temp >95°F
Low Temperature Cutout
Compressor Overload
High Temperature
Temperature >75°F for 5 min
Evaporator Filter Fault
Condenser Filter Fault
High Discharge Pressure 2
Low Suction Pressure 2
Compressor 2 Overload
Compressor 2 Rotation Fault
Fan Overload
Discharge Pressure Sensor
Failure
Discharge Pressure 2 Sensor
Fault
Fan VFD Alarm
Recirc Pump Overload
There is low process fluid flow at the pump discharge.
The refrigerant pressure, measured at the inlet of compressor 1, is low.
The refrigerant pressure, measured at the inlet of compressor 1, is high.
High amperage condition; the pump is drawing too much current.
The To Process fluid temperature is above 95°
F, measured at the evapo
-
rator outlet.
If the To Process fluid temperature falls °
5 below the minimum setpoint
(measured at the evaporator outlet) the compressor shuts off to allow the
temperature to rise.
High amperage condition; compressor 1 is drawing too much current.
To Process fluid temperature is above 75°F
(measured at the evaporator
outlet) after the compressor has been running for five minutes at startup.
The filter in the process water line is clogged.
The filter in the condenser water line is clogged (water-cooled models).
The refrigerant pressure, measured at compressor 2 outlet, is high.
The refrigerant pressure, measured at compressor 2 outlet, is low.
High amperage condition; compressor 2 is drawing too much current.
Compressor 2 is wired incorrectly. Two of the lead wires need switched.
High amperage condition; the fan motor is drawing too much current.
The sensor is incorrectly reading discharge pressure.
Sensor 2 is incorrectly reading discharge pressure.
The variable frequency drive on the fan failed.
High amperage condition; the recirculation pump is drawing too much
current.
UGH024/1103 Portable Chillers
TROUBLESHOOTING
6-23