Mitsubishi Electric CITY MULTI PUHY-P108 Service Handbook page 262

Error definition and error
Error Code
5110 Heat sink fail- When a short or an open
ure of THHS is detected just
Detail code before or during the in-
No. 01: Com- verter operation.
pressor INV
side
Detail code
No. 05: Fan
INV side
Refer to section -8- "Inverter " under part [4] "Trouble shooting principal parts" for error codes related to the inverter.
Error definition and error
Error Code
5201 High pressure 1. If the high pressure
sensor (out-
door unit)
2. If the high pressure
3. During 3-minute anti-
4. A error is not detected
detection method
(1) THHS sensor failure
(2) Contact failure
(3) Compressor INV board or
fan INV board failure
detection method
(1) High pressure sensor fail-
sensor detects ure
0.098MPa [14psi] or
less during the opera-
(2) Pressure drop due to re-
tion, the outdoor unit
frigerant leak
stops once, turns to
anti-restart mode for 3
(3) Torn wire coating
minutes, and restarts
(4) A pin on the male connec-
after 3 minutes when
tor is missing or contact
the detected high
failure
pressure sensor is
0.098MPa [14psi] or
(5) Disconnected wire
more.
(6) High pressure sensor input
circuit failure on the main
sensor detects
board
0.098MPa [14psi] or
less just before the re-
start, the outdoor unit
makes an error stop,
and the error code
"5201" will appear.
restart mode, prelimi-
nary errors will be dis-
played on the LED
display.
for 3 minutes after the
compressor start, dur-
ing defrost operation,
or 3 minutes after de-
frost operation.
- 253 -
Cause Check method and remedy
Check for short circuit in THHS sen-
sor.
Replace THHS sensor.
Replace compressor INV board or
fan INV board.
Cause Check method and remedy
Refer to the page on the trouble-
shooting of the high pressure sen-
sor. (9 [4] -1-)
[ IX Troubleshooting ]