Mitsubishi Electric M Series Installation Manual page 103

FAILURE MODE RECALL M SERIES
ABNORMAL POINT
UPPER LAMP
(FAILURE MODE/
(INDOOR UNIT)
PROTECTION)
OFF None (Normal)
Indoor/outdoor
communication, receiving
1-time flash
2.5 seconds OFF
Indoor/outdoor
communication, receiving
2-time flash
Outdoor power system
2.5 seconds OFF
Discharge temperature
thermistor
Defrost thermistor
Fin temperature thermistor
3-time flash
2.5 seconds OFF
P.C. board temperature
thermistor
Ambient temperature
thermistor
Outdoor heat exchanger
temperature thermistor
Overcurrent
4-time flash
2.5 seconds OFF
Compressor synchronous
abnormality (Compressor
start-up failure protection)
5-time flash
Discharge temperature
2.5 seconds OFF
6-time flash
High pressure
2.5 seconds OFF
- OUTDOOR UNIT - MONOSPLIT
LED INDICATION
(OUTDOOR P.C. BOARD)
-
-
error
-
error
-
1-time flash every 2.5
seconds
3-time flash
2.5 seconds OFF
4-time flash
2.5 seconds OFF
2-time flash
2.5 seconds OFF
-
11-time flash
2.5 seconds OFF
12-time flash
2.5 seconds OFF
-
-
CONDITION
-
Any signals from the inverter
P.C.
board cannot be received to check miswiring and
normally for
3 minutes.
Although the inverter P.C. board
sends signal "0", signal "1"
to check miswiring and
has been
received 30 consecutive times.
Overcurrent protection cut-out Reconnect connectors.
operates 3 consecutive times
within Refer to 12-5. "How to check
1 minute after the compressor inverter/compressor".
gets
started.
Thermistor shorts or opens "Check of outdoor thermistors".
during Defective outdoor thermistors
compressor running. can be identifi ed by checking
the blinking pattern of LED.
Reconnect compressor
Large current fl ows into power
module Refer to 12-5. "How to check
(IC700). inverter/ compressor".
Reconnect compressor
Waveform of compressor
current is
distorted. Refer to 12-5. "How to check
inverter/compressor".
Temperature of discharge
temperature thermistor exceeds
Check refrigerant circuit and
116°C, compressor stops.
Compressor can restart if
discharge
Refer to 12-5. "Check of LEV".
temperature thermistor reads
100°C or less 3 minutes later.
Temperature of indoor coil
thermistor exceeds 70°C in Check refrigerant circuit and
HEAT mode.
Temperature of defrost
thermistor
exceeds 70°C in COOL mode.
MITSUBISHI ELECTRIC / DIAGNOSTIC
INDOOR/
OUTDOOR
REMEDY UNIT FAILURE
MODE RECALL
FUNCTION
- -
Refer to 12-5. How
serial signal error.
Refer to 12-5. How
serial signal error.
Check stop valve.
Refer to 12-5.
connector.
-
Check stop valve.
connector.
-
refrigerant amount.
-
refrigerant amount.
-
Check stop valve.
OUTDOOR
UNIT
FAILURE
MODE
RECALL
FUNCTION
-
101