Error mode detected by indoor unit
| Operation of diagnostic function |
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| Judgment and measures | |
Check | Cause of operation | Status of | Condition | ||
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code | air conditioner |
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| No communication from remote | Stop | Displayed when | 1. Check cables of remote controller and communication adapters. | |
| • Remote controller LCD display OFF (Disconnection) | ||||
E03 | controller (including wireless) and | ||||
(Automatic reset) | error is detected | ||||
| communication adapter | • Central remote controller [97] check code | |||
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| The serial signal is not output from |
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| 1. Outdoor unit does not completely operate. | |
| outdoor unit to indoor unit. |
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| • Miswiring of |
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| Stop | Displayed when | • Check outdoor P.C. board. Correct wiring of P.C. board. | ||
E04 | • Defective serial sending circuit on | ||||
(Automatic reset) | error is detected | 2. When outdoor unit normally operates | |||
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| outdoor P.C. board |
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| Check P.C. board (Indoor receiving / Outdoor sending). |
•Defective serial receiving circuit on indoor P.C. board
E08 | Duplicated indoor unit address |
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| 1. | Check whether remote controller connection (Group/Individual) | |
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| was changed or not after power supply turned on | |
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L03 | Duplicated indoor master unit |
| Displayed when |
| (Finish of group construction/Address check). | |
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| Stop |
| * If group construction and address are not normal when the | ||
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L07 | There is group wire in individual indoor | error is detected |
| power has been turned on, the mode automatically shifts to | ||
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unit. |
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| address setup mode. (Resetting of address) | ||
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L08 | Unset indoor group address |
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L09 | Unset indoor capacity | Stop | Displayed when | 1. Set indoor capacity (CODE No. (DN) = 11) | ||
error is detected |
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L30 | Abnormal input of outside interlock | Stop | Displayed when | 1. Check outside devices. | ||
error is detected | 2. | Check indoor P.C. board. | ||||
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| Float switch operation |
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| 1. | Trouble of drain pump | |
P10 | Stop | Displayed when | 2. Clogging of drain pump | |||
• Float circuit, Disconnection, | ||||||
error is detected | 3. | Check float switch. | ||||
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| 4. | Check indoor P.C. board. | ||
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| 1. | Position detection error | |
P12 | Indoor DC fan error | Stop | Displayed when | 2. | ||
error is detected | 3. | Indoor fan locked. | ||||
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| 4. | Check indoor P.C. board. | |
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| 1. | Check | ||
| Stop | Displayed when | 2. Check | |||
P19 | • After heating operation has started, | |||||
(Automatic reset) | error is detected | 3. | Check indoor heat exchanger (TC/TCJ). | |||
| indoor heat exchangers temp. is | |||||
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| down. |
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| 4. | Check indoor P.C. board. | |
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P31 | Own unit stops while warning is output | Stop | Displayed when | 1. | Judge follower unit while header unit is [E03], [L03], [L07] or [L08]. | |
(Follower unit) | 2. | Check indoor P.C. board. | ||||
to other indoor units. | error is detected | |||||
| (Automatic reset) | |||||
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F01 | Stop | Displayed when | 1. | Check indoor heat exchanger temp. sensor (TCJ). | ||
indoor heat exchanger temp. sensor | 2. Check indoor P.C. board. | |||||
(Automatic reset) | error is detected | |||||
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F02 | Stop | Displayed when | 1. | Check indoor heat exchanger temp. sensor (TC). | ||
indoor heat exchanger temp. sensor | 2. Check indoor P.C. board. | |||||
(Automatic reset) | error is detected | |||||
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F10 | Stop | Displayed when | 1. | Check indoor heat exchanger temp. sensor (TA). | ||
indoor heat exchanger temp. sensor | 2. Check indoor P.C. board. | |||||
(Automatic reset) | error is detected | |||||
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F29 | Indoor EEPROM error | Stop | Displayed when | 1. Check indoor EEPROM. (including socket insertion) | ||
• EEPROM access error | (Automatic reset) | error is detected | 2. | Check indoor P.C. board. | ||
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| Communication error between indoor | Stop |
| 1. | Check indoor P.C. board. | |
E10 | MCU | Displayed when |
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• Communication error between fan | (Automatic reset) | error is detected |
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| driving MCU and main MCU |
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| Regular communication error between | Stop | Displayed when | 1. | Check remote controller wiring. | |
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E18 | indoor aster and follower units and | 2. | Check indoor power supply wiring. | |||
(Automatic reset) | error is detected | |||||
| between main and sub units | 3. | Check indoor P.C. board. | |||
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