Technical information

TIC CONTROL
ALARM
CONDITIONS
Alarm
Low Suction
Pressure (pump is
running and com-
pressor is off)
“PAL”
Possible cause
No or low flow with a
failed flow switch and
Sensor.
Compressor suction valve
is closed.
No load on the Chiller.
The Evaporator is fouled.
The Evaporator is frozen.
There is a refrigerant
leak.
The pressure switch is
faulty.
Solution
o Check To Process and
From Process valves to see
if they are open.
o Check Flow switch and
Sensor. Replace as needed.
Open valve.
Check process load for
required load. Chiller may be
oversized.
Clean Evaporator. See
Cleaning the Evaporator or
Water-cooled Condenser, in the
Maintenance section.
o Check RTD; Replace as
needed.
o Check minimum allow-
able setpoint for percent
glycol used.
Check for oil in chiller cabinet
and bubbles in refrigerant site
glass. Consult Conair Service
for repair.
See Checking Pressure
Switches, in the
Troubleshooting section.
6-10 TROUBLESHOOTING Portable Chillers UGH024/1103