9-2. Troubleshooting method
The remote controllers (main remote controller and central control device) and the interface P.C. board of an
outdoor unit are provided with an a 7-segment display (outdoor interface P.C. board) to display operational
status. Using this self-diagnosis feature, the trouble site / trouble part may be identified in the event of a trouble
by following the method described below.
The list below summarizes check codes detected by various devices. Analyze the check code according to
where it is displayed and work out the nature of the trouble in consultation with the list.
• When investigating a trouble on the basis of a display provided on the indoor remote controller or central
control device - See the “central control device or main remote controller display” section of the list.
• When investigating a trouble on the basis of a display provided on an outdoor unit - See the “Outdoor 7-
segment display” section of the list.
• When investigating a trouble on the basis of a wireless remote controller-controlled indoor unit - See the
“Indicator light block” section of the list.
Check code
Display of receiving unit
Typical trouble on site
Description of check code
Remote
controller
display
Outdoor 7-segment display
Indicator light block
Sub-code
Flash
E03
Indoor-remote controller periodic
communication check code
Communication from remote controller or network adaptor
has been lost (so has central control communication).
E04
Indoor-outdoor periodic
communication check code
Signals are not being received from outdoor unit.
E08
E08 Duplicated indoor address
Duplicated indoor address
Indoor unit detects address identical to its own.
E18
Check cod in periodic
communication between indoor
header and follower unit
Periodic communication between indoor header and
follower units cannot be maintained.
F01
ALT
Indoor heat exchanger
temperature sensor (TCJ) check
code
Heat exchanger temperature sensor (TCJ) has been open
/ short-circuit.
F02
ALT
Indoor heat exchanger
temperature sensor (TC2)
check code
Heat exchanger temperature sensor (TC2) has been open
/ short-circuit.
F03
ALT
Indoor heat exchanger
temperature sensor (TC1)
check code
Heat exchanger temperature sensor (TC1) has been open
/ short-circuit.
F10
ALT
Ambient temperature
Ambient temperature sensor (TA) has been open /
short-circuit.
sensor (TA)
check code
F11
ALT
Discharge temperature sensor
(TF) check code
Discharge temperature sensor (TF) has been open /
short-circuit.
F29
SIM
Indoor EEPROM is abnormal (some other trouble may be
detected).
L03
SIM
Duplicated indoor group header
unit
There is more than one header unit in group.
L07
SIM
Connection of group control cable
to a single indoor unit
There is at least one a single indoor unit to which group
control cable is connected.
L08
L08
SIM
Indoor group address not set
Address setting has not been performed for one or more
indoor units (also detected at outdoor unit end).
L09
SIM Indoor capacity not set
Capacity setting has not been performed for indoor unit.
L20
SIM
SIM
Duplicated central control address There is duplication in central control address setting.
L30
L30
Detected indoor unit No.
Indoor external check code
input (interlock)
Unit shutdown has been caused by external check code
input (CN80).
P01
ALT
Indoor AC fan check code
Indoor AC fan check code is detected (activation of fan
motor thermal relay).
P10
P10
Detected indoor unit No.
ALT
Indoor overflow check code
Float switch has been activated.
•
P12
ALT
Indoor DC fan check code (e.g. overcurrent or lock-up)
is detected.
P31
ALT
Other indoor unit check code
Follower unit cannot be operated due to header unit alarm
(E03 /L03 / L07 / L08).
IPDU: Compressor / Fan inverter P.C. board
: Goes off
: Lighting, : Flashing,
ALT.: Flashing is alternately when there are two flashing LED
SIM: Simultaneous flashing when there are two flashing LED
Timer Ready
Operation
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Indoor DC fan check code
E10
Communication trouble
between indoor unit MCU
Communication trouble between main MCU and the motor
microcomputer MCU
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List of check codes (indoor unit)
(Check code detected by indoor unit)
Communication check code
between Application control kit
and indoor unit
Communication check code between Application control
kit and indoor unit P.C. board
E11
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P.C. board or other indoor
check code
F30
ALT
Occupancy sensor trouble
Occupancy sensor trouble has been detected.
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- 125 -
Summary of Contents for MMC-UP0151HP-E
Page 41: ...2 2 Ceiling type MMC UP0151HP E TR MMC UP0181HP E TR 41 ...
Page 42: ...MMC UP0241HP E TR MMC UP0271HP E TR 6 4 12 7 42 ...
Page 43: ...MMC UP0361HP E TR MMC UP0481HP E TR MMC UP0561HP E TR 43 ...
Page 58: ...3 WIRING DIAGRAMS 3 1 4 way cassette type MMU UP HP E TR 58 ...
Page 59: ...3 2 Ceiling type MMC UP HP E TR 59 ...
Page 60: ...3 3 Concealed Duct Standard type MMD UP BHP E TR 60 ...
Page 61: ...3 4 Concealed Duct High Static Pressure type MMD UP HP E TR 61 ...
Page 62: ...Concealed Duct High Static Pressure type MMD UP HP E TR 62 ...
Page 63: ...3 5 Concealed Duct High Static Pressure fresh air intake type MMD UP HFP E TR 63 ...
Page 65: ...3 7 High wall type MMK UP HP E TR 65 ...
Page 249: ...MMU UP0361HP E TR MMU UP0481HP E TR MMU UP0561HP E TR 268 267 213 214 249 ...
Page 252: ...12 2 Ceiling type MMC UP0151HP E TR MMC UP0181HP E TR 025 024 252 ...
Page 254: ...MMC UP0241HP E TR MMC UP0271HP E TR 029 028 254 ...
Page 256: ...MMC UP0361HP E TR MMC UP0481HP E TR MMC UP0561HP E TR 051 028 027 256 ...
Page 261: ...MMD UP0151BHP E TR MMD UP0181BHP E TR 240 239 238 233 235 261 ...
Page 263: ...MMD UP0241BHP E TR MMD UP0271BHP E TR MMD UP0301BHP E TR 240 239 238 233 235 263 ...
Page 265: ...MMD UP0361BHP E TR MMD UP0481BHP E TR MMD UP0561BHP E TR 240 239 238 233 235 265 ...