Mitsubishi Electric M Series Installation Manual page 104

MITSUBISHI ELECTRIC / DIAGNOSTIC
FAILURE MODE RECALL SERIE M
ABNORMAL POINT
UPPER LAMP
(FAILURE MODE/
(INDOOR UNIT)
PROTECTION)
7-time flash
Fin temperature/P.C. board
2.5 seconds
temperature
OFF
8-time flash
2.5 seconds Outdoor fan motor
OFF
Nonvolatile memory data
9-time flash
2.5 seconds
OFF
Power module (IC700)
10-time flash
2.5 seconds Discharge temperature
OFF
Bus-bar voltage (DC)
11-time flash
2.5 seconds
OFF
Each phase current of
compressor".
Stop valve (Closed valve)
14-time flash
or more
2.5 seconds
4-way valve/
OFF
Pipe temperature
16 lampeggi Outdoor refrigerant system
2.5 sec. spenta abnormality
102
- OUTDOOR UNIT - MONOSPLIT
LED INDICATION
(OUTDOOR P.C. BOARD)
Temperature of fin temperature
thermistor on the inverter P.C.
board exceeds 75~ 86°C, or
7-time flash
temperature of P.C. board
2.5 seconds OFF
temperature thermistor on the
inverter P.C. board exceeds 72
Outdoor fan has stopped
3 times in a row within 30
-
seconds after outdoor fan
Nonvolatile memory data
5-time flash
2.5 seconds OFF
The interface short circuit
occurs in the output of the
6-time flash
power module (IC700). The
2.5 seconds OFF
compressor winding shorts
Temperature of discharge
temperature thermistor has
-
been 50°C or less for 20
8-time flash
Bus-bar voltage of inverter
2.5 seconds OFF cannot be detected normally
Each phase current of
9-time flash
compressor cannot be detected
2.5 seconds OFF
14-time flash
Closed valve is detected by
2.5 seconds OFF compressor current.
The 4-way valve does not
16-time flash
work properly. The indoor coil
2.5 seconds OFF
thermistor detects an abnormal
A closed valve and air trapped
in the refrigerant circuit
are detected based on the
1-time flash
temperature sensed by the
2.5 seconds OFF
indoor and outdoor thermistors
and the current of the
CONDITION REMEDY
Check around outdoor unit.
Check outdoor unit air passage.
Refer to 12-5. "Check of
outdoor fan motor".
~ 85°C.
Refer to 12-5. "Check of
outdoor fan motor".
Refer to 12-5. "Check of
startup. inverter P.C. board".
cannot be Replace the inverter P.C. board.
read properly.
Refer to 12-5. "How to check
inverter/compressor".
circuit.
Refer to 12-5. "Check of LEV".
Check refrigerant circuit and
minutes. refrigerant amount.
Refer to 12-5. "How to check
inverter/ Each phase current of
compressor".
normally.
Check stop valve.
Check the 4-way valve.
Replace the inverter P.C. board.
temperature.
Check for a gas leak in a
connecting piping etc.
Check the stop valve.
Refer to 12-5. "Check of
compressor. outdoor refrigerant circuit".
OUTDOOR
INDOOR/
UNIT
OUTDOOR
FAILURE
UNIT FAILURE
MODE
MODE RECALL
RECALL
FUNCTION
FUNCTION
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-
-
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