Sakura COOLING ONLY Installation, Operation & Maintenance Manual - page 22
Blower bearing
Pillow block type bearing unit is used. Double sealed by heat & an oil resistant synthetic rubber seal
prevents possible leak-out of lubricant grease with its lip pushing innering. Periodical maintenance is
recommended for the bearing with the injection of grease for supplement.
Supplement of grease is recommended at least once every Six months. If and when the unit is not
operated for more than 30 days, supplement of grease is strongly recommended right before the switch is
turned off. It helps to prevent possible rust from being accumulated during the period.
Regreasing Procedure shall be as follows :-
- Wipe and clean dirtion on the grease nipple. Special attention is to be given to this, Without which the
rolling face of the bearing might be damaged and, in the long run, could cause rouble.
- The quantity of supplement at grease may be very little as tabulated below. General practice indicates the
quantity of grease should be only enough for the operate to witness a small leakage from the slinger.
- Check if the bearing condition is normal by the temperature of the being at work. When the ambient
temperature of bearing does not go beyond 40
o
C
TROUBLESHOOTING
If any malfunction of the air conditioner unit is noted, check the following fault conditions and causes for
some simple troubleshooting tips.
Symptoms Probable
Causes
Remedy
Unit does not run.
Power Failure.
Press the (ON/OFF) after
power restore.
Fuse blown or circuit breaker tripped.
Replace fuse or reset
circuit breaker.
Power supply wiring phase incorrect.
Modify the wiring phase.
Compressor does not run.
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.
Seized compressor
Replace compressor.
Compressor stop on low pressure
control
Low pressure control erratic in action
Raise differential setting.
Check capillary for
pinches. Replace control.
Compressor suction shutoff valve partially
closed
Open valve.
Low refrigerant charge
Add refrigerant.
Compressor cycles on high
pressure control
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.
Condenser fan not operating
Reset condenser fan
overload. Check motor
and wiring, Repair or
replace if defective.
Unit operates long or
continuously
Low refrigerant charge
Add refrigerant.
Symptoms Probable
Causes
Remedy
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SAKURA - Total Air Conditioning Solution