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350
FDT(N)-H
8.6.3
Diagnosing of microcomputer circuit
(1)
Selfdiagnosis function
(a)
Indoor unit side
(i)
Only case of wireless remote control model.
Error Code
Failure at:
Contents of the failure
Defective connection or broken wire for operating switch signal wire.
Signal noise has entered the operating switch wire.
Is the circuit board for the operating switch or the circuit board for the indoor unit is defective
(communication circuit defective)?
Indoor unit heat exchanger thermistor defective (element defective or broken wire). Defective
connection of connector for thermistor.
Indoor unit return thermistor defective (element defective or broken wire). Defective connection
of connector for thermistor.
Indoor unit heat exchanger thermistor defective (short circuit).
Indoor unit circuit board defective (defective thermistor input circuit)?
Indoor unit circuit board defective (defective thermistor input circuit)?
Indoor unit circuit board defective (defective thermistor input circuit)?
Heating overload (temperature of heat exchanger for indoor unit abnormally high)
Indoor unit heat exchanger thermistor defective (short circuit).
Indoor unit circuit board defective (defective thermistor input circuit)?
Failure with the condensate pump (DM), or open circuit or disconnection of connector with the condensate pump.
Malfunctioning of the float switch (erroneous functioning)
Indoor unit circuit board defective (defective float switch input circuit)
Indoor unit circuit board defective (defective DM driving output circuit)
1 Remote controller for multiple unit control, 17 or more indoor units connected
Gas leak.
E1
E6
E7
E8
E9
E57
E10
Operating switch wire
(signal noise)
Circuit board for operating
switch or indoor unit
Indoor unit heat exchanger
thermistor
Indoor unit circuit board
Indoor unit air inlet thermistor
Indoor circuit board
Indoor unit heat exchanger thermistor
Indoor unit circuit board
Indoor unit circuit board
Installation and operating conditions
Indoor unit heat exchanger thermistor
Indoor unit circuit board
Failure in drainage
Float switch
Number of indoor units connected
Insufficient refrigerant
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Check indicator table
Table of inspection items based on error codes
Note (1)
Inspection LED display has a cycle of 8 seconds (flashing time of 0.5 seconds).
(ii)
Only case of wired remote control model.
Failure mode on the indoor unit indicated by flashing Yellow LED and Green LED.
Indoor unit LED
Indoor unit heat exchanger thermistor defective (element defective or broken wire).
Defective connection of connector for thermistor.
Indoor unit circuit board defective (defective thermistor input circuit)?
Indoor unit return thermistor defective (element defective or broken wire).
Defective connection of connector for thermistor.
Indoor unit circuit board defective (defective thermistor input circuit)?
Failure with the condensate pump (DM), or open circuit or disconnection of connector with the condensate pump.
Malfunctioning of the float switch (erroneous functioning)
Indoor unit circuit board defective (defective float switch input circuit)
Indoor unit circuit board defective (defective DM driving output circuit)
Gas leak.
Indoor unit heat exchanger thermistor defective (short circuit).
Indoor unit circuit board defective (defective thermistor input circuit)?
Heating overload (temperature of heat exchanger for indoor unit abnormally high)
Indoor unit heat exchanger thermistor defective (short circuit)?
Indoor unit circuit board defective (defective thermistor input circuit)?
1 time flash
2 time flashes
2 time flashes
4 time flashes
5 time flashes
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Yellow
Green
Failure at:
Contents of the failure
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6 time flashes
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Indoor unit air return thermistor
Indoor circuit board
Low voltage protection
Indoor unit heat exchanger
thermistor
Indoor unit circuit board
Indoor unit circuit board
Failure in drainage
Float switch
Insufficient refrigerant
Indoor unit heat exchanger thermistor
Indoor unit circuit board
Installation and operating conditions
Indoor unit heat exchanger thermistor
Indoor unit circuit board
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When the power source voltage is 80% of rating or lower.
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Summary of Contents for SRRM40HENG-L
Page 1: ...MITSUBISHI DAIYA 2000 AIR CONDITIONING HEAT PUMP MACHINERY HANDBOOK ...
Page 52: ...50 SRK GZ MEMO ...
Page 94: ...92 SRK H MEMO ...
Page 104: ...102 102 SRK C MEMO ...
Page 180: ...178 SCM HG 4room MEMO ...
Page 222: ...220 SCM HG 2room MEMO ...
Page 234: ...232 SCM CG 2room MEMO ...
Page 266: ...SCM C 264 MEMO ...
Page 406: ...404 FDT N C MEMO ...
Page 442: ...440 FDEN H MEMO ...
Page 470: ...468 FDEN C MEMO ...
Page 504: ...502 FDKN H MEMO ...
Page 580: ...578 FDR H MEMO ...
Page 698: ...696 V MULTI Models FDR258 A 308 A ...
Page 724: ...722 V MULTI MEMO ...
Page 1094: ...1092 FDC HKXR MEMO ...