Technical information

When an alarm condition occurs, the Alarm light on the con-

trol panel lights and the control screen displays the alarm mes-

sage.

PLC C

ONTROL

NSWERING

ALARMS

Low Suction Pressure

Before an alarm can be reset with the acknowledge key, the

alarm condition must be cleared. Refer to the Alarm table and

the Troubleshooting tables to troubleshoot the alarm condi-

tion(s). After correcting the condition, remove the alarm from

the screen. Press and hold the Alarm Silence/Reset button for

a minimum of 3 seconds to remove alarm from screen. To

begin running the chiller again, press the Run button on the

Main screen.

STATUS SETUP RUN ALM

Press arrow

If there is a fault affecting compressor operation such as over-

load, high or low discharge pressure, compressor fault, etc.,

there is a three-minute delay before the compressor can be

started. The compressor light will flash quickly indicating that

manual reset is necessary. The manual reset should be per-

formed only after the alarm condition has been diagnosed and

corrected. The manual reset will start the compressor provided

all other permissive are enabled. To manually reset the com-

pressor, press the Alarm Silence button and the Enter button

simultaneously.

To view a list of the last 10 alarms, refer to Alarm History

Screens, in the Troubleshooting section of this manual. Alarms

are numbered and listed in order of occurrence, starting with

the most recent.

UGH024/1103 Portable Chillers

TROUBLESHOOTING

6-19