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Mitsubishi Electric PURY-P200 Service Handbook page 138

City multi r410a
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Table of Contents
Checking code
Meaning, detecting method
5101
Discharge
1. Shorting (high temperature in-
(TH11)
take) or open (low temperature
(TH12)
intake) of the thermistor is de-
tected. (First detection)
Piping
The outdoor unit will stop at
5105
(TH5)
once and the restart preven-
tion mode will be operated for
3 minutes. When the detection
5106
Outdoor
temperature of the thermistor
air
is within the normal range just
tempera-
before the restart, the unit
ture
must be restarted.
(TH6)
2. When shorting or open is de-
tected again (second detec-
tion) during the operation after
5107
Liquid
the restart, the outdoor unit will
tempera-
stop at once and the restart
ture
prevention mode will be operat-
(TH7)
ed for 3 minutes. When the de-
tection temperature of the
thermist or is within the normal
SC coil
range just before the restart,
5108
outlet
the unit must be restarted.
(TH8)
3. When shorting or open is de-
tected 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 be-
fore 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 detect-
ed for 10 minutes after starting
the compressor or for 3 mi-
nutes during or after defrosting.
Radiator pan-
THHS open or shorting is
5110
el tempera-
detected just before starting the
ture sensor
inverter or during operation.
abnormality
Error details 01:
Compressor
INV side
Error details 05:
Fan INV side
5111
1.When short (high temp. inlet)
or open (low temperature
Liquid inlet
(TH11)
inlet) of thermistor is detected
during operation, error stop
will be commenced displaying
5112
"5111" or "5112," or "5115" or
Bypass
"5116".
outlet
2.The above detectection is not
(TH12)
made during defrostig and 3-
minute after changing
5115
operation mode.
Bypass
inlet
(TH15)
5116
Intermedi-
ate section
(TH16)
✻
For the check code on the inverter, refer to
Cause
(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
Shorting detection
TH11 240˚C or higher (0.57kΩ)
TH12 240˚C or higher (0.57kΩ)
TH5 110˚C or higher (0.4kΩ)
TH6 110˚C or higher (0.4kΩ)
TH7
70˚C or higher (1.14kΩ)
TH8
70˚C or higher (0.4kΩ)
(1) THHS sensor failure
(2) Contact failure
(3) INV board failure of the
compressor or the fan
(1) Thermistor trouble.
(2) Biting of lead wire.
(3) Broken cover.
(4) Coming off of pin at connector
portion, poor contact.
(5) Broken wire.
(6) Faulty thermistor input
circuit of control board.
Short Detected
TH11
110°C or more
TH12
110°C or more
TH15
70°C or more
TH16
70°C or more
"
"
7. Inverter and compressor
in the section [4]
- 135 -
Checking method & Countermeasure
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.
Open detection
0˚C or lower (643kΩ)
0˚C or lower (643kΩ)
-40˚C or lower (130kΩ)
-40˚C or lower (130kΩ)
-40˚C or lower (130kΩ)
-40˚C or lower (130kΩ)
Check for short circuit in THHS
sensor.
Replace THHS sensor.
Replace INV board of the
compressor or the fan.
Check thermistor resistance.
Check lead wire biting.
Check broken cover.
Check coming off of pin at
connector.
Check broken wire.
Check sensor sensing temperature. If
it deviates from the actual temerature
seriously, replace control panel.
Open Detected
(0.4 kΩ)
-40°C or less (130 kΩ)
(0.4 kΩ)
-40°C or less (130 kΩ)
(1.14 kΩ)
-40°C or less (130 kΩ)
(0.4 kΩ)
-40°C or less (130 kΩ)
"
Troubleshooting of principal parts
"
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