Specifications

Dimplex Thermal Solutions 1800-YOU-KOOL
Low refrigerant
pressure fault -
(Automatically
reset when
satisfied with
pressure)
 Low ambient air temperature.
 Loss of fluid flow through
evaporator.
 Loss of refrigerant.
 Refrigerant solenoid not
functional.
 Faulty pressure switch.
 Compressor crankcase not warm
or faulty crankcase heater.
 Ensure chiller is operating within its
designed ambient temperature specification.
 Check fluid flow and ensure evaporator is
clean.
 Have a refrigerant technician leak check unit
and charge with the appropriate refrigerant.
 Check wiring to solenoid or replace valve.
 Replace pressure switch.
 Ensure main power disconnect has been on
for at least 8 hours prior to use. Replace
crankcase heater if faulty.
High refrigerant
pressure fault -
(Manually reset
inside of chiller)
(Example of a
high pressure
switch shown)
AIR COOLED CHILLERS:
 Air filters dirty.
 Condenser dirty.
 Incoming air too hot.
 Inoperative fans.
 Back panel out of chiller.
 Phase rotation incorrect.
 Refrigerant system overcharged.
WATER COOLED CHILLERS:
 Low water flow to condenser.
 Condenser dirty.
 Regulating valve operating
incorrectly.
 Refrigerant system overcharged.
 Clean filters (See maintenance section).
 Clean condenser (See maintenance section).
 Ensure the chiller is properly ventilated with
fresh air not exceeding 90°F, unless
designed for high-ambient temperature
operation.
 Check for blown fan fuses.
 Ensure all covers and panels are in chiller.
 Correct phase rotation at incoming power.
 Have a refrigeration technician ensure the
system is properly charged.
 Check condenser water supply and pressure.
 Clean condenser.
 Have a refrigeration technician adjust the
valve to the proper pressure setting and
check operation.
 Have a refrigeration technician ensure the
system is properly charged.
Compressor
overload -
(May be manually
or automatically
reset, depending
on compressor)
 Compressor running too hot.
 Temperature setpoint too high.
 Refrigerant pressures too high or
low.
 Faulty overload module.
 Low voltage to chiller.
 Defective compressor.
 Allow compressor to cool, then restart unit.
 Move temperature setpoint to +/- 10°F of
factory setting.
 Have a refrigeration technician monitor
pressures and determine cause.
 If compressor will run, check amp draw on
compressor leads to verify compressor is ok.
 Correct incoming voltage.

Replace compressor.