36
FORM CIM 0203
ITEM
PROBLEM
PROBABLE CAUSE
SOLUTION
CODE
Air or other non-
Evacuate system and recharge. Install new
condensable gas in
filter-drier.
system
Condenser air intake
Clean away debris.
8
Head pressure too high
blocked
Overcharge of
Reclaim excess from high pressure side
refrigerant
of the system.
Condenser fan not
Check power to motor and ensure correct
operating
rotation of blower.
Condenser water not
Check water regulating valve and adjust
circulating
for required GPM through the unit.
9
Head pressure too low
See Item 3, 4, & 7 above
Correct as indicated.
Flash gas in liquid line
Repair leak and recharge.
(bubbles in sight glass)
due to a leak.
Obstructed expansion
Repair or replace valve.
valve
Suction pressure too
10
low
Loss of fluid within
Replace power head and valve.
expansion valve bulb.
Clogged filter-drier
Replace with new filter-drier.
Ice or dirt on evaporator
Defrost and clean evaporator coil
coil
and replace filter.
Thermostat set too low
Adjust thermostat to the desired temperature.
Circuit breaker tripped or
blown
Check for electrical short. Replace breaker.
11
Heater inoperative
Heater high limit
Insufficient air across heater elements. Check
switch open
for obstructed or dirty filters.
Heat elements burned
Check continuity with OHM meter. Replace
out
heater element.
12
Water carry over
Excessive air through
Reduce CFM to unit specifications.
unit
Summary of Contents for 4CA1901
Page 2: ...2 FORM CIM 0203 ...
