Mitsubishi Electric CITY MULTI PUHY-P108 Service Handbook page 292

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.
Temperature sensor failure (BC controller)
Error definition and error
Error Code
5111 Liquid inlet 1. When a short (high
(TH11)
5112 Bypass outlet
(TH12)
5115 LEV3 outlet
(TH15)
5116 LEV3 inlet
(TH16)
2. The short or open de-
Error definition and error
Error Code
5201 High pressure 1. If the high pressure sensor
sensor (out-
door unit)
2. If the high pressure sensor
3. During 3-minute anti-re-
4. A error is not detected for 3
detection method
(1) THHS sensor failure
(2) Contact failure
(3) Compressor INV board or
fan INV board failure
detection method
(1) Thermistor failure
temperature inlet) or (2) Pinched lead wire
an open (low tempera- (3) Torn wire coating
ture inlet) of the ther- (4) A pin on the male connec-
mistor is detected tor is missing or contact
during operation, an failure
error stop will be (5) Disconnected wire
made, and "5111", (6) Thermistor input circuit
"5112", "5115", or failure on the main board
"5116" will be dis-
played.
scribed above is not
detected during de-
frost or 3 minutes after
the operation mode is
changed.
detection method
(1) High pressure sensor fail-
detects 0.098MPa [14psi]
ure
or less during the opera-
tion, the outdoor unit stops
once, turns to anti-restart
(2) Pressure drop due to re-
mode for 3 minutes, and
frigerant leak
restarts after 3 minutes
when the detected high (3) Torn wire coating
pressure sensor is
(4) A pin on the male connec-
0.098MPa [14psi] or more.
tor is missing or contact
detects 0.098MPa [14psi]
failure
or less just before the re-
(5) Disconnected wire
start, the outdoor unit
makes an error stop, and
(6) High pressure sensor input
the error code "5201" will
circuit failure on the main
appear.
board
start mode, preliminary er-
rors will be displayed on
the LED display.
minutes after the compres-
sor start, during defrost op-
eration, or 3 minutes after
defrost operation.
- 283 -
Cause
Check for short circuit in THHS sen-
sor.
Replace THHS sensor.
Replace compressor INV board or
fan INV board.
Cause
Check thermistor resistance.
Check lead wire.
Check for torn wire coating.
Check connector.
Check the intake temperature of the
sensor with the LED monitor.
When the temperature is far different
from the actual temperature, replace
the control board.
Short is detection
TH11 110 C [230 F ] and above (0.57 k )
TH12 110 C [230 F ] and above (0.4 k )
TH15 70 C [158 F ] and above (0.4 k )
TH16 110 C [230 F ] and above (1.14 k )
Cause
Refer to the page on the trouble-
shooting of the high pressure sen-
sor.(9 [4] -1-)
[ IX Troubleshooting ]
Check method and remedy
Check method and remedy
Open detection
-40 C [ -40 F ] and below (130 k )
-40 C [ -40 F ] and below (130 k )
-40 C [ -40 F ] and below (130 k )
-40 C [ -40 F ] and below (130 k )
Check method and remedy