9 TROUBLESHOOTING
Confirmation and check
Check method
When a fault occurs in the air conditioner, the check code and the indoor unit No. will appear on the display part of the remote controller.
The check code will only be displayed while the unit is in operation.
If the display disappears, operate the air conditioner according to the following “Confirmation of error history” for confirmation.
Confirmation of error history
When a fault occurs in the air conditioner, the error history can be confirmed with the following procedure. (The error history is stored in memory and can contain up to 4 errors).
This history can be confirmed from either the operating status or the stop status.
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CODE No.
UNIT No.
R.C. No.
Check code | Indoor unit No. in which |
| an error occurred |
TEMP. |
| ON / OFF |
2 |
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TIMER SET | FAN | MODE |
TIME | SWING/FIX | VENT |
FILTER |
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RESET TEST SET CL | UNIT |
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1
On the remote controller (Main remote controller, Central control remote controller) and the interface P.C. board of the outdoor unit, a check display LCD (Remote controller) or
Check code list
The following list shows each check code. Find the check contents from the list according to part to be checked.
•In case of a fault from the indoor remote controller: See “Main remote controller display” in the list.
•In case of a fault from the outdoor unit: See “Outdoor
•In case of a fault from the indoor unit with a wireless remote controller: See “Sensor block display of receiving unit” in the list.
Terminology | IPDU : Intelligent Power Drive Unit | |||
¡ : Lighting, | ¤: Flashing, | l : Goes off | ||
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ALT. : Flashing is alternately when there are two flashing LED.
SIM : Simultaneous flashing when there are two flashing LED.
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| Check code | Wireless remote controller |
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Main |
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| Outdoor | Sensor block display | Check code name | Judging device | |||
remote |
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| of receiving unit |
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controller |
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display |
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| Auxiliary code | Operation | Timer | Ready | Flash |
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E01 |
| — | — | ¤ l | l |
| Communication error between indoor and remote | Remote controller | |
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| controller (Detected at remote controller side) | |||||||
E02 |
| — | — | ¤ | l | l |
| Remote controller transmission error | Remote controller |
E03 |
| — | — | ¤ l | l |
| Communication error between indoor and remote | Indoor | |
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| controller (Detected at indoor side) | |||||||
E04 |
| — | — | l | l | ¤ |
| Communication circuit error between indoor/outdoor | Indoor |
Procedure | Description |
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| When pushing the SET and TEST buttons simultaneously for 4 seconds |
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| or more, the display similar to the one shown in the figure to the right |
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| CODE No. | |
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1 | If [Service Check] is displayed, the fault code will be stored in the |
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UNIT No. | ||||
error history mode. | ||||
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| R.C. No. | |||
•01 (Order of error history) is displayed in CODE No. window.
•Check Code is displayed in the CHECK window.
•The indoor unit address, where the fault has occurred will be displayed in the UNIT No. window.
When pushing the 
TEMP. buttons, the error history stored within the memory will be displayed in chronological order.
2 | The numbers displayed within the CODE No. window can vary between 1 and 4. 1 being the most recent fault |
and 4 being the oldest. | |
| CAUTION |
| Do not push the CL button as this will erase all of the error history for that indoor unit. |
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3 | After confirmation, push the TEST button. This will return the display back to its original mode. |
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E06 | E06 | No. of indoor units in which sensor has | l | l | ¤ |
| Decrease of No. of indoor units | I/F |
been normally received |
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— | E07 | — | l | l | ¤ |
| Communication circuit error between indoor/outdoor | I/F |
| (Detected at outdoor side) | |||||||
E08 | E08 | Duplicated indoor addresses | ¤ l | l | Duplicated indoor addresses | Indoor / I/F | ||
E09 | — | — | ¤ | l | l | Duplicated main remote controllers | Remote controller | |
E10 | — | — | ¤ l | l | Communication error between indoor MCU | Indoor | ||
E12 | E12 | 01: Indoor/Outdoor communication | ¤ l | l | Automatic address start error | I/F | ||
02: Communication between outdoor units | ||||||||
E15 | E15 | — | l | l | ¤ |
| Indoor is nothing during automatic addressing | I/F |
E16 | E16 | 00: Capacity over | l | l | ¤ |
| Capacity over / No. of connected indoor units | I/F |
01 ~: No. of connected units |
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E18 | — | — | ¤ | l | l | Communication error between indoor units | Indoor | |
E19 | E19 | 00: Header is nothing | l | l | ¤ |
| Outdoor header units quantity error | I/F |
02: Two or more header units |
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E20 | E20 | 01: Outdoor of other line connected | l | l | ¤ |
| Other line connected during automatic address | I/F |
02: Indoor of other line connected |
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E23 | E23 | — | l | l | ¤ |
| Sending error in communication between outdoor units | I/F |
E25 | E25 | — | l | l | ¤ |
| Duplicated follower outdoor addresses | I/F |
E26 | E26 | No. of outdoor units which received signal | l | l | ¤ |
| Decrease of No. of connected outdoor units | I/F |
normally |
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E28 | E28 | Detected outdoor unit number | l | l | ¤ |
| Follower outdoor unit error | I/F |
01:IPDU1 error
02:IPDU2 error
03:IPDU1, 2 error
E31 | E31 04: Fan IPDU error | l | l | ¤ | IPDU communication error | I/F |
05:IPDU + Fan IPDU error
06:IPDU2 + Fan IPDU error
07:All IPDU error