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IV-7
SM831148
4. Service procedures
1
2
3
4
5
6
Judgment condition
Clear condition
F31
L02
L04
L07
L10
L13
E07
E06
E14
E15
E16
E20
E31
H01
Remote
controller
alarm display
Alarm
contents
Judgment and correction
Automatic recovery
EEPROM trouble Reading/writing failure Recovery at power
reset
1. Check EEPROM (IC007).
2. Check outdoor unit control
PCB.
Mismatch of indoor
and outdoor unit types
(Espacio, Multi )
Indoor unit judges that type
does not match outdoor unit
type.
Recovery at power
reset
1. Check indoor unit EEPROM.
2. Check indoor unit control
PCB.
Settings failure
Settings failure
Settings failure
Duplicated outdoor unit
address (system address)
1. Check outdoor unit
system address.
2. Check inter-unit control
wiring.
Group control wiring is
connected to an
independent-control indoor
Recovery at power
reset
1. Check inter-unit control
wiring.
2. Check indoor unit
EEPROM.
Outdoor unit capacity not set. Recovery at power
reset
Check outdoor unit EEPROM.
Indoor-outdoor unit
types
Outdoor unit judges that type
does not match indoor unit
type.
Recovery at power
reset
1. Check indoor unit
EEPROM.
2. Check outdoor unit control
PCB.
Outdoor unit detected
abnormal signal from
indoor unit.
Serial signal receiving failure
(including failure to verify No.
of units)
Automatic
recovery
Automatic
recovery
1. Check inter-unit control
wiring.
2. Check outdoor unit
Outdoor unit sending
failure to indoor unit
lortnoc tinu-retni kcehC .1eruliaf gnidnes langis laireS
wiring.
2. Check outdoor unit control
PCB.
Settings failure Duplicated master unit in
simultaneous-operation multi
control
(Detected by outdoor unit)
Recovery at power
reset
1. Check inter-unit control
wiring.
2. Check indoor unit
combination.
Automatic address
setting failure
Automatic address
setting failure
Automatic address
setting failure
Indoor unit capacity too low. Recovery at power
reset
Recovery at power
reset
Recovery at power
reset
1. Check inter-unit control
wiring.
2. Check outdoor unit control
PCB.
lortnoc tinu-retni kcehC .1.hgih oot yticapac tinu roodnI
wiring.
2. Check outdoor unit control
PCB.
Outdoor unit cannot receive
any serial signals from indoor
units.
1. Check inter-unit control
wiring.
2. Check outdoor unit control
PCB.
Communications
trouble within unit
No communication possible
with MDC for 3 minutes or
longer.
Automatic recovery Check outdoor unit control
PCB.
Overcurrent Inverter stops after alarm is
detected.
Recovery at restart 1. Refrigerant cycle trouble,
overload operation
2. Loose screws between HIC
control PCB and radiating
plate
3. Cooling failure of radiating
plate
4. Check outdoor unit PCB
wiring.