Lennox ECOLOGIC Series User Manual

• 36 • Installation - Operation - Maintenance manual (IOM) • AIR COOLED CHILLERS & SPLIT UNITS - 0105-E
TROUBLESHOOTING - REPAIRS
8.1 LIST OF THE MOST COMMON PROBLEMS - continued
PROBLEMS – SYMPTOMS PROBABLE CAUSE RECOMMENDED ACTION
F) THE COMPRESSOR CUTS OUT ON ANTIFREEZE PRESSURE SWITCH
- Antifreeze pressure switch
tripped
- Check that the pressure switch
is operating properly
- Low water flow in the evaporator - Check the water pump
- Evaporator obstructed - Determine the degree of fouling
by measuring water pressure
drop
- Evaporator frozen up - Measure pressure drop in water
circuit, keep water circulating
until evaporator has thawed
completely
- Low refrigerant charge - Check the refrigerant charge and
add refrigerant if necessary
G) THE COMPRESSOR CUTS OUT ON ITS MOTOR PROTECTION THERMAL RELAY
- Thermal protection Tripped - Check operation of thermal
protection, change it if necessary
- Motor windings are not being
sufficiently cooled
- Measure superheat in the
evaporator, adjust it if necessary
H) COMPRESSOR CUTS OUT THROUGH ACTION OF THE MAIN POWER FUSE
- Power supply on two phases
only
- Check power supply voltage
- Faulty motor windings - Replace the compressor
- Compressor seized - Replace the compressor
I) THE COMPRESSOR STARTS WITH DIFFICULTY
- Faulty windings - Replace the compressor
- Mechanical problem - Replace the compressor

Lennox ECOLOGIC Series Specifications

General

Brand	Lennox
Model	ECOLOGIC Series
Category	Chiller
Language	English