4
4. Service procedures
(3)Meanings of alarm messages
Possible Cause of Malfunction |
| Alarm | |||
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• Serial |
| Remote controller is detecting |
| E1 | |
commu- |
| error signal from indoor unit. |
| E2 | |
nication |
| • Indoor unit is detecting error signal from the remote controller. | E3 | ||
errors |
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| (No serial communications signal) |
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| Indoor unit is detecting error |
| E4 | ||
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| signal from outdoor unit. |
| E5 | |
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| Outdoor unit is detecting error |
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| signal from indoor unit. |
| E6 | |
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| Indoor unit is not working |
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| Outdoor unit is transmitting error |
| E7 | |
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| Improper setting of indoor unit or |
| E8 | |
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| remote controller. |
| E9 | |
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| E12 |
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| When using group control, main indoor unit address setting is duplicated. | E14 | ||
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| (For single heat pump type.) | |||
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| Error in Auto. address setting. |
| E15 | |
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| (No. or capacity of judged indoor unit is small.) | |||
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| Error in Auto. address setting. |
| E16 | |
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| (No. or capacity of judged indoor unit is large.) | |||
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| Indoor unit is detecting error signal from another indoor unit. | E18 | ||
Activation of |
| Protective device in indoor unit | • Thermal protector in indoor fan motor is activated. | P1 | |
protective |
| is activated. |
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device |
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| Protective device in outdoor |
| • Thermal protector in outdoor fan motor is activated. | P2 | |
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| unit is activated. |
| • Comp. thermal protector is activated. | |
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| Incorrect discharge gas temp. of comp. | P3 |
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| P4 | |
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| Incorrect power supply voltage . Negative phase, defective | P5 |
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| phase or voltage drop. | |
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| Incorrect discharge gas temp. of comp. | P17 |
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| Protective device in indoor unit |
| Improper wiring connections of ceiling panel. | P9 |
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| is activated. |
| Float switch is activated. | P10 |
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NOTE |
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● RCU : | Remote Control Unit (remote controller) |
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●R.C. : Refrigerant Circuit
●comp. : Compressor
●temp. : Temperature
● PCB : Printed Circuit Board
SM830082
IV - 6
