CellarPro 3000Scm, Owner'S Manual

Page: 48 / 53

48
V3.3.16
Other Troubleshooting Issues
Issue Possible Causes Potential Solutions
No cooling: no refrigerant
flow.
If the "snowflake" icon is
illuminated on the
temperature display
control, the compressor
should be running. Electronic Control:
No power to
evaporator
Valve control: no
power to liquid
solenoid valve coil Power supply to Evaporator interrupted. Restore
power.
(Valve control only) Power supply to solenoid coil
interrupted: loose wire. Inspect for loose fan
wiring and reconnect.
Solenoid coil
failure (Valve
control option only) When the Evaporator is powered on and off, a
distinct "click" should be heard indicating the
opening/closing of the solenoid valve. If not, the
solenoid coil may need to be replaced. Consult
factory.
No power to
compressor Power supply to Condensing Unit interrupted.
Restore power.
Check for loose wires and reconnect.
Low pressure switch is open: On Valve control
systems, make sure solenoid is energized.
Jumper out switch to check for a faulty switch,
and replace if necessary. Note that in
installations below 0°F this switch may remain
open. Consult factory.
High pressure switch is open: refer to the "High
Pressure Safety Shutdown" section.
High pressure
safety shutdown /
high discharge
pressure Locate and correct source of high condensing
head pressure:
Refrigeration line blockage
Condenser fan not operating in ambient
temperatures above 90°F. Ensure that there is
power to the Condensing Unit and verify the fan
cycling control settings. Replace condenser fan
and fan cycling control if necessary.
Insufficient ventilation: reference Condensing
Unit installation guidelines for proper placement
and ambient temperature requirements. Correct
to ensure adequate air ventilation to and from the
Condensing Unit.
Improper refrigerant charge: inspect for over-
charged system or non-condensables in system.