INSUFFICIENT
COOLINNG
THERMOSTAT
HIGH DISCHARGE
PRESSURE
RETURN AIR
TEMPERATURE
STOP VALVES IN
DISCHARGE LINE
CONDENSER WATER
INLET TEMPERATURE
TOO HIGH
FAULTY ELEMENTS
HIGH DISCHARGE PRESSURE OR
LOW SUCTION PRESSURE
POOR DUCT INSULATION
PARTIALLY CLOSED VALVE
IMPROPER COOLING TOWER OPERATION
AIR LOCKS IN PIPING
CONDENSER
WATER FLOW
LOW DISCHARGE
PRESSURE
CONDENSER WATER
INLET TEMPERATURE
CONDENSER
WATER FLOW
RESTRICTED WATER PIPING LINE
WATER FLOW TOO LOW
IMPROPER ADJUSTMENT OF WATER
OVERCHARGED REFRRIGERANT
NON-CONDENSIBLE GAS
SCALES ON CONDENSER TUBES
HIGH SUCTION PRESSURE
IMPROPER COOLING TOWER OPERATION
IMPROPER ADJUSTMENT OR WATER
FAULTY COMPRESSOR PLATE
INSUFFICIENT DUCT INSULATION
FAULTY THERMOSTAT ELEMENT
OVERCHARGED REFRIGERANT
HIGH DISCHARGE PRESSURE
EXCESSIVE OPENING OF THERMO VALVE
LOW SUCTION PRESSURE
REFRIGERANT UNDER CHARGED
COMPRESSOR
SIGHTGLASS
HIGH SUCTION
PRESSURE
EVAPORATOR AIR
INLET TEMPERATURE
REPAIR OR REPLACE THE
THERMOSTAT
SEE "HIGH DISCHARGE PRESSURE"
OR "LOW SUCTION PRESSURE"
INSULATE AND REPAIR DUCT
FULLY OPEN THE VALVE
CHECK COOLING TOWER
OPERATION
PURGE AND REMOVE AIR-LOCKS
CHECK PUMP AND PIPING LINE
SET THE VALVE CORRECTLY
PURGE THE EXCESS REFRIGERANT
PURGE THE REFRIGERANT,
RE-EVACUATE AND CHARGE NEW
REFRIGERANT
CLEAN THE CONDENSER TUBES
SEE "HIGH SUCTION PRESSURE"
CHECK COOLING TOWER
SET THE VALVE CORRECTLY
REPLACE THE COMPRESSOR
SEE "LOW SUCTION PRESSURE"
ADD REFRIGERANT, REPAIR LEAKS
IF NECESSARY
OPERATION
REINFORCE THE DUCT INSULATION
REPAIR OR REPLACE
THERMOSTAT
PURGE THE REFRIGERANT
SEE "HIGH DISCHARGE PRESSURE"
ADJUST THERMO VALVE
TOO HIGH
TOO LOW
SPACE LOAD TOO BIG
ADD ADDITTIONAL UNIT
REDUCE FRESH AIR INTAKE
TOO MUCH FRESH AIR
CONNECTIONS
CORRECT CONDENSER INLET/OUTLET
WATER FLOW IN REVERSE DIRECTION
REGULATING VALVE
CHECK PUMP AND PIPING LINE
FLOW
TROTTLING WATER TO CORRECT
EXCESSIVE WATER FLOW
REGULATING VALVE
REDUCE THE FRESH AIR INTAKE
INCREASE SIZE OF UNIT
EXCESSIVE FRESH AIR INTAKE
SPACE LOAD TOO HIGH
=FAULT
=CHECK
=CAUSE
=REMEDY
5.0 MAINTENANCE
