Installation, Operation and Maintenance Manual
C13-Series
30
Subject to change without notice.
10.20-IM (0818)
ITEM CODE
PROBLEM
PROBABLE CAUSE
SOLUTION
8
Head pressure too high
Air or other non-condensable gas in system
Condenser air intake blocked
Overcharge of refrigerant
Condenser fan not operating
Condenser water not circulating
Condenser blower running backwards
Evacuate system and recharge. Install new
filter-drier.
Clean away debris.
Reclaim excess from high pressure side of the
system.
Check power to motor and ensure correct rotation
of blower.
Check water regulating valve and adjust
Check phase of incoming power to unit (3 ph units
only). Reverse any two incoming power supply
wires (except ground).
9
Head pressure too low
See Item 3, 4, & 7 above
Correct as indicated
10
Suction pressure too low
Flash gas in liquid line (bubbles in sight
glass) due to a leak.
Obstructed expansion valve
Loss of fluid within expansion valve bulb.
Clogged filter-drier
Ice or dirt on evaporator coil
Evaporator blower running backwards
Repair leak and recharge.
Repair or replace valve.
Replace power head and valve.
Replace with new filter-drier.
Defrost and clean evaporator coil and replace filter.
Check phase of incoming power to unit (3 ph units
only). Reverse any two incoming power supply
wires (except ground).
11
Heater inoperative
Thermostat set too low
Circuit breaker tripped or blown
Heater high limit switch open
Heat elements burned out
Adjust thermostat to the desired temperature.
Check for electrical short. . Replace breaker if
defective.
Insufficient air across heater elements. Check for
obstructed or dirty filters.
Check continuity with OHM meter. Replace heater
element.
12
Water carry over
Excessive air through unit
Reduce CFM to unit specifications.
Содержание C13-Series
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