Sakura COOLING ONLY Installation, Operation & Maintenance Manual - page 23
Control contacts fused
Replace control.
Air in system
Purge.
Partially plugged or plugged expansion
valve
Clean or replace.
Defective insulation
Replace or repair.
Compressor loses oil
Leak in system
Repair leak.
Crankcase heaters not energized during
shutdown.
Replace heater, check
wiring.
System noise
Piping vibration
Support piping as
required. Check for loose
pipe connections.
Expansion valve hissing
Add refrigerant. Check
for plugged liquid line
strainer.
Compressor noisy
Check valve plates for
valve noise. Replace
compressor (worn
bearing). Check for loose
compressor hold-down
bolts.
Frosted or swearing suction line
Expansion valve admitting excess
refrigerant
Adjust Expansion valve.
Hot liquid line
Shortage of refrigerant due to leak
Repair leak and
recharge.
Expansion valve opens too wide
Adjust Expansion valve.
Frosted liquid line
Restricted filter dryer
Remove restriction or
replace filter dryer.
Compressor will not unload
Burned out coil
Replace coil.
Leaky bypass piston
Replace.
Weak bypass piston spring
Replace.
Airflow is low.
Filter is filled with dust and dirt.
Clean the filter.
There are some obstacles at the air inlet or
outlet of the units.
Remove obstacles.
Compressor operates
continuously.
Dirty air filter.
Clean the air filter.
Temperature setting too low (for cooling).
Temperature setting too high (for heating).
Reset the temperature.
No cool air come out during
cooling cycle, or no hot air come
out during heating cycle.
Temperature setting too high (for cooling).
Temperature setting too low (for heating).
Set the temperature
lower.
Set the temperature
higher.
If the fault persists, please call your authorized local dealer/serviceman
.
22
SAKURA - Total Air Conditioning Solution
•
The manufacturer reserves the right to revise any of the specification and design contain herein at
any time without prior notification.
SAKURA CORPORATION
Tel: +81-45-949-8550 Fax: +81-45-949-8551
2-17-1, Eda-minami, Tsuzuki-ku, Yokohama, Kanagawa,224-0007, Japan
E-mail: mail@sakura-aircon.com Web: www.sakura-aircon.com