Replace high pressure
sensor.
Check unit side.
• Isn’t the air circulation
of outdoor unit short-
circuited?
• Are installation spaces
adequate?
• Isn’t there any fouling
or clogging on heater
exchanger?
Control operation check*
Defective outdoor control
PCB
➞
Replace.
Excessive refrigerant
amount: Recharge
refrigerant by weighing
proper amount on a scale.
2. Error detection method
For the error detection method,
refer to the protective control by
controlling compressor rotation
speed and cooling high pressure
protective control of micro
computer control function for
corresponding models.
(
Refer to 41 page
)
3.
Condition of Error displayed
• When anomalous rise of
the high pressure sensor is
detected 5 times within 1 hour.
• When high pressure sensor
anomaly is detected for 10
minutes continuously.
4. Presumable cause
• Defective high pressure sensor
•
Defective outdoor control PCB
• Indoor, outdoor unit
installation spaces
• Short-circuit of air on indoor,
outdoor units
• Fouling, clogging of heat
exchanger
• Excessive refrigerant quantity
Note:
Cooling
high pressure
operation
(
Model SCM100
,
125
)