– 69 –
Check code
Display of receiving unit
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T
TCC-LINK
central control
or main remote
controller
display
Outdoor 7-segment display
Indicator light block
Sub-code
Flash
E03
Indoor-remote controller periodic
communication erro
Communication from remote controller or network adaptor has
been lost (so has central control communication).
E04
Indoor-outdoor periodic
communication error
Signals are not being received from outdoor unit.
E08
E08
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E10
Indoor inter-MCU communication
error
MCU communication between main controller and motor
microcontroller is faulty.
E18
Error in periodic communication
between indoor header and
follower unit
Periodic communication between indoor header and follower units
cannot be maintained.
T
L
A
1
0
F
Indoor heat exchanger
temperature sensor (TCJ) error
Heat exchanger temperature sensor (TCJ) has been open /
shortcircuited.
T
L
A
2
0
F
Indoor heat exchanger
temperature sensor (TC2) error
Heat exchanger temperature sensor (TC2) has been open /
shortcircuited.
T
L
A
3
0
F
Indoor heat exchanger
temperature sensor (TC1) error
Heat exchanger temperature sensor (TC1) has been open /
shortcircuited.
T
L
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0
1
F
Ambient temperature sensor (TA)
error
Ambient temperature sensor (TA) has been open / short-circuited.
T
L
A
1
1
F
Discharge temperature sensor
(TF) error
Discharge temperature sensor (TF) has been open /
shortcircuited.
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9
2
F
P.C. board or other indoor error
Indoor EEPROM is abnormal (some other error may be detected).
M
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3
0
L
Duplicated indoor group header
unit
There is more than one header unit in group.
M
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7
0
L
Connection of group control cable
to stand-alone indoor unit
There is at least one stand-alone indoor unit to which group control
cable is connected.
M
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8
0
L
8
0
L
Indoor group address not set
Address setting has not been performed for one or more indoor
units (also detected at outdoor unit end).
M
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9
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L
Indoor capacity not set
Capacity setting has not been performed for indoor unit.
M
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0
2
L
SIM
Duplicated central control address There is duplication in central control address setting.
L30
L30
Detected indoor unit No.
Indoor external error input
(interlock)
Unit shutdown has been caused by external error input (CN80).
T
L
A
1
0
P
Indoor AC fan error
Indoor AC fan error is detected (activation of fan motor thermal
relay).
P10
P10
Detected indoor unit No.
ALT
Indoor overflow error
Float switch has been activated.
T
L
A
2
1
P
Indoor DC fan error
Indoor DC fan error (e.g. overcurrent or lock-up) is detected.
T
L
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1
3
P
Other indoor unit error
Follower unit cannot be operated due to header unit alarm (E03 /
L03 / L07 / L08).
IPDU: Intelligent Power Drive Unit (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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6-2. Troubleshooting method
The remote controllers (main remote controller and central control remote controller) and the interface P.C.
board of an outdoor unit are provided with an LCD display (remote controller) or a 7-segment display (outdoor
interface P.C. board) to display operational status. Using this self-diagnosis feature, the fault site / faulty part
may be identified in the event of a fault 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 fault in consultation with the list.
• When investigating a fault on the basis of a display provided on the indoor remote controller or TCC-LINK
central control remote controller -
See the “TCC-LINK remote controller or main remote controller display” section of the list.
• When investigating a fault on the basis of a display provided on an outdoor unit - See the “Outdoor 7-
segment display” section of the list.
• When investigating a fault on the basis of a wireless remote controller-controlled indoor unit - See the “Light
sensor indicator light block” section of the list.
List of check codes (indoor unit)
(Error detected by indoor unit)
Summary of Contents for MMC-AP0154H-E(-TR)
Page 145: ... 145 ...
Page 149: ... 149 9 2 1 Way cassette type SH 4 2 0 P A 8 1 0 P A 5 1 0 P A ...
Page 156: ... 156 MMU AP0056MH ...
Page 159: ... 159 9 4 Slim duct type MMD AP0054SPH AP0074SPH AP0094SPH AP0124SPH AP0154SPH AP0184SPH ...
Page 162: ... 162 MMD AP0056MH ...
Page 165: ... 165 9 5 Concealed duct standard type MMD AP0074BH AP0094BH AP0124BH AP0154BH AP0184BH ...
Page 166: ... 166 ...
Page 169: ... 169 MMD AP0244BH AP0274BH AP0304BH AP0364BH AP0484BH ...
Page 170: ... 170 ...
Page 173: ... 173 MMD AP0564BH ...
Page 174: ... 174 ...
Page 177: ... 177 E Parts ...
Page 179: ... 179 9 6 Concealed duct high static pressure type MMD AP0184H AP0244H AP0274H AP0364H AP0484H ...
Page 183: ... 183 MMD AP0724H AP0964H ...
Page 184: ... 184 ...
Page 187: ... 187 9 7 Ceiling type MMC AP0154H AP0184H AP0244H AP0274H ...
Page 190: ... 190 MMC AP0364H AP0484H ...
Page 194: ... 194 9 8 Floor standing type MMF AP0154H AP0184H AP0244H AP0274H ...
Page 195: ... 195 MMF AP0154H AP0184H AP0244H AP0274H ...
Page 198: ... 198 MMF AP0364H AP0484H AP0564H ...
Page 199: ... 199 MMF AP0364H AP0484H AP0564H ...
Page 203: ... 203 9 9 Floor standing concealed type MML AP0074BH AP0094BH AP0124BH AP0154BH AP0184BH ...
Page 206: ... 206 MML AP0244BH ...
Page 209: ... 209 9 10 Floor standing cabinet type MML AP0074H AP0094H AP0124H AP0154H AP0184H ...
Page 210: ... 210 MML AP0074H AP0094H AP0124H AP0154H AP0184H ...
Page 213: ... 213 MML AP0244H ...
Page 214: ... 214 MML AP0244H ...