Mitsubishi Electric PU(H)Y-P250YGM-A Service Handbook page 133

[ IX Troubleshooting ]
Error Code
4250 IPM error
4255 (Detail code
101)
ACCT overcur-
rent breaker
trip
(Detail code
102)
DCCT over-
current break-
er trip
(Detail code
103)
Overcurrent
breaker trip
(Detail code
106,107)
IPM short/
grounding fault
(Detail code
104)
Overcurrent
error due to
short-circuited
motor
(Detail
code105)
4260 Cooling fan
4265 abnormality
Error definition and error
detection method
When an error signal of
IPM is detected
When overcurrent break
(94 Apeak or 35 Arms) is
detected by the current
sensor.
When IPM short damage
or grounding on the load
side is detected just be-
fore starting the inverter.
When a short is detected
on the compressor or the
fan motor just before the
inverter operation.
In the case of 4260
When the heat sink
temperature
(THHS1) 95°C or
more is detected for
10 or more minutes
at inverter startup
In the case of 4265
When the heat sink
temperature
(THHS5) 85°C or
more is detected for
10 or more minutes
at inverter startup
Cause
In the case of 4250
(1) Inverter output related
(2) Same as 4230 error
In the case of 4255
(1) Fan motor abnormality
(2) FAN INV board failure
(1) Inverter output related
In the case of 4250
(1) Grounding fault of com-
pressor
(2) Inverter output related
In the case of 4255
(1) Grounding fault of fan mo-
tor
(2) FAN INV board failure
In the case of 4250
(1) Short-circuited compres-
sor
(2) Output wiring
(3) Power supply
In the case of 4255
(1) Short-circuited fan motor
(2) Output wiring
(3) Power supply
Same as 4230 error
- 124 -
Check method and remedy
Same as 4230 error
Refer to 9 [4]-6-(2) [6].
Refer to 9 [4]-6-(2) [7].
9 [4]-6-(2) Inverter output related
troubles
Refer to [1] - [5].
Refer to 9 [4]-6-(2).
Refer to 9 [4]-6-(2) [6].
Refer to 9 [4]-6-(2) [7].
Refer to 9 [4]-6-(2) [2].
Refer to [4]-6-(2) [6].
Refer to Same as 4230 error.