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Operation Manual - (CP05 / CP10) Commercial Control Interface
Doc. No. 0525-031 Ver. 3 190308
CONDITION CAUSES OR CHECKPOINTS
The system
does not start
• Check that 5 minutes has passed from Turn-On time, as the system has
inbuilt timers.
• Check that setpoint temperature settings are correct.
• Check that the setpoint temperature is set low enough for cooling or
high enough for heating.
Air does not ow
(Indoor Unit)
• During heating operation, air does not ow out for approximately 15
seconds after start up, this prevents cold draft.
Cooling/Heating is
not sufcient
• The cooling/heating function may not work effectively when the indoor
"return air lter" is clogged with dust and dirt.
• Make sure the air inlet and air outlet on the outdoor unit are not blocked.
• The outside temperature is above or below the design conditions.
Steam is coming
out from the
outdoor unit
• It is caused by the defrosting of the outdoor unit in heating operation
during cold ambient conditions.
Water from the
outdoor unit
• This is normal during heating operation, which is due to water forming
on the heat exchanger.
Occurring of noises
• When heating or cooling is started or stopped, a swishing or gurgling
noise may be heared, This noise is generated by the refrigerant owing
between the outdoor and the indoor units.
• A swooshing noise may be heared from the outdoor unit during
operation. This noise is generated when the refrigerant changes
direction in the defrost operation.
• On start up, the outdoor unit may be louder than normal for a few
seconds while the compressor reaches the designated speed and
operating pressure.
• During defrost operation, the compressor may generate more noise than
normal.
Setpoint
Temperature cannot
be adjusted
• The Control Interface has inbuilt upper and lower limit setting. Setpoint
temperature can only be adjusted within these limits.
7-Day Timeclock is
not turning the air
conditioner On and
Off
• Check that the timeclock is activated (see pages. 23-24).
NOTE: Before contacting your installer for further assistance, please have your airconditioner's
Model No. and Serial No, with you. (See page 35).
TROUBLESHOOTING GUIDE
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