Lennox ECOLOGIC Series User Manual

Installation - Operation - Maintenance manual (IOM) • AIR COOLED CHILLERS & SPLIT UNITS - 0105-E • 33 •
TROUBLESHOOTING - REPAIRS
8.1 LIST OF THE MOST COMMON PROBLEMS
PROBLEMS – SYMPTOMS PROBABLE CAUSE RECOMMENDED ACTION
A) THE COMPRESSOR DOES NOT START
- No power supply - Check main power supply and
switch positions
- Motor control circuits
established, the compressor
does not run
- Compressor motor burnt out - Replace
- Low voltage reading on
voltmeter
- Voltage too low - Contact power company
- Determine the cause.
If the system is in running order,
close the disconnect
- Breaker tripped or fuses blown
- Check condition of fuses
- No water flow in the evaporator - Measure flow, check the water
pump and water circuitry and
filters
- Find the cause of the trip out - Flow switch contacts open
- Check circulation of liquid in the
evaporator, and the condition of
the flow switch
- Anti short cycle relay action - Wait until the anti short cycle
time delay has expired
- Faulty control thermostat - Check for proper operation, set
points, contacts
- Oil pressure switch tripped - Check the oil pressure switch
and determine the cause of the
trip out
- Antifreeze thermostat or low
pressure safety switch tripped
- Check evaporating pressure, the
condition of the antifreeze
thermostat and the low pressure
safety switch
- Compressor thermal
protection relay tripped
- Check for proper operation of
the relay
- The system does not start up
- High pressure safety switch
tripped
- Check the condensing pressure,
and the condition of the high
pressure safety switch

Lennox ECOLOGIC Series Specifications

General

Brand	Lennox
Model	ECOLOGIC Series
Category	Chiller
Language	English