QBD COOLING SYSTEMS INC.
20
08 -2015
47-0480-192-N
Compressor starts,
but does not switch
off from start winding
•
Improper wiring
•
Low voltage
•
Relay failed
•
Run capacitor failed
•
Excessive high discharge
temperature
•
Compressor failed
•
Wrong setting of LP/HP switch
•
Check wiring against diagram
•
Find out the reason & correct
•
Replace relay
•
Replace capacitor
•
Check for over charge or condenser
blockage / condenser fan failure
•
Replace compressor
•
Reset the LP/HP switch to correct
setting
Compressor starts
and runs,
but short cycles on
the
overload protector
•
Excess current passing through
overload
•
Low / unstable voltage
•
Overload failed
•
Capacitor fault
•
Excessive discharge
•
Suction pressure too high
•
Compressor overheating
•
Compressor electrical fault
•
Check wiring diagram for wrong connections
of electrical components
•
Find out the reason & correct
•
Replace overload
•
Replace capacitor
•
Check for over charge or condenser
blockage / condenser fan failure
•
Check refrigerant charge
•
Replace compressor
Units runs OK, But
short cycles
•
Overload protection
•
Thermostat
•
Check the wiring
•
Replace the overload
•
Change the thermostat setting if required
Warm temperature
•
Control setting at warm
•
Inadequate air circulation
•
Reset the controller setting to colder
•
Improve air movement