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Checking code
Meaning, detecting method
Cause
Checking method & Countermeasure
5201
5301
1
When pressure sensor detects
1 kg/cm
2
G (0.098 MPa) or less
during operation, outdoor unit
once stops with 3 minutes re-
starting mode, and restarts if
the detected pressure of pres-
sure sensor exceeds 1 kg/cm
2
G
(0.098 MPa) immediately be-
fore restarting.
2
If the detected pressure of
sensor is less than 1 kg/cm
2
G
(0.098 MPa) immediately be-
fore restarting, error stop is
commenced displaying 5201.
3
Under 3 minutes restarting
mode, LED displays intermit-
tent fault check.
4
During 3 minutes after com-
pressor start, defrosting and 3
minutes after defrosting opera-
tions, trouble detection is ig-
nored.
•
If IDC 20 A peak is detected
just before the inverter starts,
or
•
If IDC 10 A peak is detected
during inverter operation after
5 seconds has passed since
the inverter started when the
INV board’s SW1-1 is OFF.
Refer to
Troubleshooting of pres-
sure sensor
.
Check the contacts of CNCT on the
INV board.
Check the DCCT polarity.
•
With SW1-1 OFF, is the inverter’s
output wiring open?
•
With SW1-1 OFF, is a compressor
which is not specified for this model
connected to the inverter’s output?
If none of the items in 1) to 3) is appli-
cable, and if the trouble reappears
even after the power is switched on
again, replace the INV board and the
DCCT (when replacing the circuit
board, be sure to connect all the con-
nectors, ground wires, etc. securely)
by the following procedure.
1
Replace the INV board only. If it
recovers, the INV board is defec-
tive.
2
If it does not recover, reinstall the
INV board and replace the DCCT.
If it recovers, the DCCT is defec-
tive.
If it does not recover after
1
and
2
above, both the INV board and the
DCCT are defective.
1) Pressure sensor trouble.
2) Inner pressure drop due to a leak-
age.
3) Broken cover.
4) Coming off of pin at connector por-
tion, poor contact.
5) Broken wire.
6) Faulty thermistor input circuit of MAIN
board.
1) Contact is faulty.
2) The current sensor (DCCT) is con-
nected with reverse polarity.
3) An error was made in the SW1-1
setting.
4) The INV board is defective. The cur-
rent sensor (DCCT) is defective.
Pressure
sensor
abnormality
(Variable
capacity unit)
IDC sensor/
circuit
abnormality
(Variable
capacity unit)
Содержание CITY MULTI PUHY-400YMF-B
Страница 13: ... 10 Noise filter NF DC reactor DCL Noise filter box Noise Filter Box Rear of the controller box ...
Страница 16: ... 13 FANCON board CNV CNW CNU CNFC2 ...
Страница 17: ... 14 RELAY board CN51C2 CNOUT2 CNRT2 CN52F CN52C2 CNCH ...
Страница 20: ... 17 CONT board SWU2 CNTR SWU1 CNFC1 SW3 SW2 CNS1 M NET transmission CN20 Power supply 1 N 3 L1 ...
Страница 26: ... 23 ...
Страница 50: ... 47 ...
Страница 152: ... 149 Model PUHY 400YMF B 500YMF B ...