Technical information

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PAL: (Pressure alarm low) flashes when the low refrigerant
pressure switch has sensed low pressure for more than the low
pressure ignore time (lpl). This is a cycling alarm up to three
times per hour.
Third type of Alarm
Third type of alarm is a latching type. This alarm shuts down
the compressor on t he first trip and must be manually reset
upon correction of the fault condition. This high pressure and
sensor failure alarms are of this type.
The indicators that flash when the unit is in alarm are:
RSt: Flashes on restoration of power after a power loss.
PSH: Flashes on the Refrigerant high-pressure switch. This is
a latching alarm and the high-pressure switch might
require to be manually reset before this alarm can be acknowl-
edged.
SF2: Indicates that the To process temperature sensor is
indicating out of range.
UGH024/1103 Portable Chillers
OPERATION
4-15
TIC A
LARMS
CONTINUED
Continued