Sakura SRT-30RA Installation Manual - page 15
Page 14 of 15
TROUBLESHOOTING
If any malfunction of the air conditioner unit is noted, check the following fault conditions and causes for
some simple troubleshooting tips.
Symptoms
Probably Causes
Remedy
Power Failure.
Press the (ON/OFF) after power
restore.
Fuse blown or circuit breaker
tripped.
Replace fuse or reset circuit breaker.
Unit does not run.
Power supply wiring phase
incorrect.
Modify the wiring phase.
Power line open.
Reset Circuit breaker.
Control circuit breaker trip.
Check control circuit for ground or
short ; repair and reset breaker.
Safety device tripped
Reset control circuit.
Contactor stuck open
Replace contactor.
Loose terminal connection
Check connections.
Improperly wired controls
Check wiring and rewire.
Low line voltage
Check line voltage—determine
location of voltage drop and remedy
deficiency.
Compressor motor defective
Check motor winding for open or
short. Replace compressor, if
necessary.
Compressor does not
run.
Seized compressor
Replace compressor.
Low pressure control erratic in
action
Raise differential setting. Check
capillary for pinches. Replace
control.
Compressor suction shutoff valve
partially closed
Open valve.
Compressor stop on low
pressure control
Low refrigerant charge
Add refrigerant.
High pressure control erratic in
action
Check capillary tube for pinches. Set
control is required.
Compressor discharge valve
partially closed
Open valve, or replace if defective.
Air in system
Purge.
Compressor cycles on
high pressure control
Condenser fan not operating
Reset condenser fan overload.
Check motor and wiring, Repair or
replace if defective.
Low refrigerant charge
Add refrigerant.
Control contacts fused
Replace control.
Air in system
Purge.
Unit operates long or
continuously
Defective insulation
Replace or repair.
Compressor loses oil
Leak in system
Repair leak.