After Equipment Shuts Down, It Cannot Be Restarted For A While - Daikin SkyAir Super Inverter 70 D Series Service Manual

Troubleshooting Based on Equipment Condition
3.5 After Equipment Shuts Down, It cannot be Restarted for
a While.
Applicable Model
All models of SkyAir series
Error Detection
Method
Error Generating
Condition
Possible Cause
Troubleshooting
112
Overcurrent relay (for compressor)
Compressor protection thermostat
Overcurrent relay may act due to the following reasons
Lower voltage of power supply
Excess level of high pressure
Insufficient size of power cable
Malfunction of compressor
Compressor protection thermostat may act due to the following reasons
Internal leakage of four-way valve (There is no difference between suction and discharge
temperature)
Insufficient compression of compressor
Incorrect refrigerant
Faulty expansion valve
Insufficient circulation of refrigerant
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Turn the operation switch ON
and OFF, then wait at ON
side.
Does the unit
start operation after
3 minutes?
NO
Is the
discharge side of
compressor hot after unit
stop?
YES
Check on the cause why
overcurrent relay (for
compressor) or compressor
protection thermostat acted.
YES
[Electric system]
Power
supply voltage is within
±10 % of specified
voltage.
NO
Not so hot YES
Is the
size of power cable
through total length
correct?
[Refrigerant circuit]
YES
After vacuum drying, charge
correct amount of refrigerant.
Then, start operation again.
Is there any
temperature difference
between inlet and outlet
of expansion
valve?
YES
Is
there any
temperature difference
between suction side and
discharge side of
four-way
valve?
YES
Malfunction of compressor
SiE25-110
Normal. Unit is in 3-min
standby mode
NO
Contact power company
Check compressor
NO
Replace power cable
NO
Expansion valve
malfunction
NO
Four-way valve malfunction
Check compressor
(S1993)
Troubleshooting