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MECHANICAL
CONDITIONS
CONT’D
UGH016/0500 Series 1 Portable Chillers, TIC Control
TROUBLESHOOTING 6-13
Alarm
Low Suction
Pressure (pump is
running and com-
pressor is off)
Possible cause
No or low flow with a
failed flow switch and
RTD.
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
❏ Check To Process and From
Process valves to see if they
are open.
❏ Check Flow switch and
RTD. 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.
❏ Check RTD; Replace as
needed.
❏ Check minimum allowable
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.