Mitsubishi Electric P250, Руководство по обслуживанию

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Checking code Meaning, detecting method Cause Checking method & Countermeasure
5101
5105
5106
5107
Discharge
(TH11)
(TH12)
Piping
(TH5)
Outdoor
air
tempera-
ture
(TH6)
Liquid
tempera-
ture
(TH7)
SC coil
outlet
(TH8)
(1) Thermistor failure
(2) Pinched lead wire
(3) Coating tear
(4) No pin on the connector,
contact failure
(5) Disconnected wire
(6) Thermistor input circuit
failure on the main board
Thermistor resistance check
Check for lead wire.
Check for coating.
Check for connector.
Check for wire.
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.
1. Shorting (high temperature
intake) or open (low
temperature intake) of the
thermistor is detected. (First
detection)
The outdoor unit will stop at
once and the restart
prevention mode will be
operated for 3 minutes. When
the detection temperature of
the thermistor is within the
normal range just before the
restart, the unit must be
restarted.
2. When shorting or open is
detected again (second
detection) during the
operation after the restart, the
outdoor unit will stop at once
and the restart prevention
mode will be operated for 3
minutes. When the detection
temperature of the thermistor
is within the normal range just
before the restart, the unit
must be restarted.
3. When shorting or open is
detected again (third
detection) during the
operation after the restart, the
outdoor unit will make an
error stop.
4. When shorting or open of the
thermistor is detected just
before the restart, the unit will
make an error stop and check
code “5101”, “5103”, “5104”,
“5105”, “5106”, “5107”, and
“5108” will appear.
5. LED display, which indicates
the grace period, will appear
while the restart prevention
mode is being operated.
6. Shorting or open is not
detected for 10 minutes after
starting the compressor or for
3 minutes during or after
defrosting.
5108
5110 Radiator
panel
temperature
sensor
abnormality
Error details 01:
Compressor
INV side
Error details 05:
Fan INV side
(1) THHS sensor failure
(2) Contact failure
(3) INV board failure of the
compressor or the fan
Check for short circuit in THHS
sensor.
Replace THHS sensor.
Replace INV board of the
compressor or the fan.
THHS open or shorting is
detected just before starting the
inverter or during operation.
Shorting detection
TH11 240˚C or higher (0.57k
Ω
)
TH12 240˚C or higher (0.57k
Ω
)
TH5 110˚C or higher (0.4k
Ω
)
TH6 110˚C or higher (0.4k
Ω
)
TH7 70˚C or higher (1.14k
Ω
)
TH8 70˚C or higher (0.4k
Ω
)
Open detection
0˚C or lower (643k
Ω
)
0˚C or lower (643k
Ω
)
-40˚C or lower (130k
Ω
)
-40˚C or lower (130k
Ω
)
-40˚C or lower (130k
Ω
)
-40˚C or lower (130k
Ω
)
T
emper
ature sensor abnor
mality (Outdoor unit)
✻
For the check code on the inverter, refer to
“
6. Inverter and compressor
”
in the section [4]
“
Troubleshooting of principal parts
”