Mitsubishi Electric CITY MULTI PUHY-P108 Service Handbook page 259

[ 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
Refer to section -8-"Inverter " under part [4] "Trouble shooting principal parts" for error codes related to the inverter.
Error definition and error
detection method
When an error signal of In the case of 4250
IPM is detected (1) Inverter output related
(2) Same as 4230 error
In the case of 4255
(1) Fan motor abnormality
(2) FAN INV board failure
When overcurrent break (1) Inverter output related
(150 Apeak or 60 Arms)
is detected by the current
sensor.
When IPM short damage In the case of 4250
or grounding on the load (1) Grounding fault of com-
side is detected just be-
fore starting the inverter. (2) Inverter output related
In the case of 4255
(1) Grounding fault of fan mo-
(2) FAN INV board failure
When a short is detected In the case of 4250
on the compressor or the (1) Short-circuited compres-
fan motor just before the
inverter operation. (2) Output wiring
(3) Power supply
In the case of 4255
(1) Short-circuited fan motor
(2) Output wiring
(3) Power supply
In the case of 4260 Same as 4230 error
When the heat sink
temperature
(THHS1) 95°C
[203°F] or more is
detected for 10 or
more minutes at in-
verter startup
In the case of 4265
When the heat sink
temperature
(THHS5) 85°C
[185°F] or more is
detected for 10 or
more minutes at in-
verter startup
Cause
pressor
tor
sor
- 250 -
Check method and remedy
Same as 4230 error
Refer to 9 [4]-8-(2) [6].
Refer to 9 [4]-8-(2) [7].
9 [4]-8-(2) Inverter output related
troubles
Refer to [1] - [5].
Refer to 9 [4]-8-(2).
Refer to 9 [4]-8-(2) [6].
Refer to 9 [4]-8-(2) [7].
Refer to 9 [4]-8-(2) [2].
Refer to [4]-8-(2) [6].
Refer to Same as 4230 error.