Mitsubishi Electric City Multi PQHY-P72 Service Handbook page 205

[ IX Troubleshooting ]
Error Code
4250 IPM error
(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
abnormality
Refer to section -7-"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 (1) Inverter output related
IPM is detected (2) Same as 4230 error
When overcurrent break (1) Inverter output related
(150 Apeak or 60 Arms)
is detected by the current
sensor.
When IPM short damage (1) Grounding fault of com-
or grounding on the load
side is detected just be- (2) Inverter output related
fore starting the inverter.
When a short is detected (1) Short-circuited compres-
on the compressor or the
fan motor just before the (2) Output wiring
inverter operation. (3) Power supply
When the heat sink tem- Same as 4230 error
perature (THHS1) 95°C
[203°F] or more is detect-
ed for 10 or more minutes
at inverter startup
Cause
pressor
sor
- 196 -
Check method and remedy
Same as 4230 error
9.[4].-7-.(2) Inverter output related
troubles
Refer to [1] - [5].
Refer to 9.[4].-7-.(2)
Refer to 9.[4].-7-.(2) [2]
Refer to Same as 4230 error.