4-2. Self-Diagnostics Table (Ceiling Cassette Type)
INDOOR UNIT | OPERATION button |
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| OPERATION lamp |
TIMER lamp
HIGH POWER lamp
REMOTE CONTROL receiver
Since the indications cover various units, the corresponding parts listed below may not be present in some models.
Indication on indoor unit | .... OFF |
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OPERATION | Timer | HIGH POWER | Code | Diagnostics items |
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| S01 | Room temperature sensor failure | (1) | Sensor open circuit or short circuit |
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| (2) | Contact failure at connector or open circuit at terminal crimping location | |||||||||||
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| S02 | Indoor heat exchanger sensor failure | |||||||||||||
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| (3) | Indoor/outdoor PCboard failure |
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| S04 | Compressor temperature sensor failure | (1) | Sensor open circuit or short circuit |
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| (2) | Contact failure at connector or open circuit at terminal crimping location | |||||||||||
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| S05 | Outdoor heat exchanger sensor failure | |||||||||||||
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| (3) | Outdoor PCboard failure |
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| S06 | Outdoor air temperature sensor failure |
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| S07 | Outdoor electrical current detection | Outdoor PCboard failure |
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| Indoor/outdoor communications failure | (1) | (2) AC power failure | (3) Blown fuse | (4) Power Relay failure | |||||||||
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| E01 | (5) | Indoor or outdoor PCboard failure | (6) Outdoor Fan Motor failure (7) Reactor failure | |||||||||||
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| (serial communications) | (8) | (9) Overload Relay failure | (10) Magnetic Coil failure | |||||||||||
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| E02 | • HIC circuit failure | (1) | HIC or power Tr failure (2) Outdoor fan does not turn. | (3) Instantaneous power outage | ||||||||||
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| (4) | Service valve not opened. | (5) Outdoor fan blocked. | (6) Continuous overload operation | |||||||||||
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| • Power Tr (transistor) circuit failure | ||||||||||||||
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| (7) | Compressor failure | (8) Outdoor PCboard failure |
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| E03 | Outdoor unit external ROM (OTP data) | (1) | External ROM data failure |
| (2) Outdoor PCboard failure |
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| E04 | Peak current | (1) | Instantaneous power outage | (2) HIC or power transistor failure | ||||||||||
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| (3) | Outdoor PCboard failure |
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| E05 | PAM circuit failure | (1) | Outdoor PCboard failure | (2) Outdoor power supply voltage failure | ||||||||||
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| Active circuit failure | ||||||||||||||
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| E06 | Compressor discharge overheat | (1) Electric expansion valve failure | (2) Capillaries choked | (3) Shortage of refrigerant | ||||||||||
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| prevention activated. | (4) Continuous overload operation | (5) Outdoor fan does not rotate | (6) Outdoor PCboard failure | |||||||||||
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| E07 | Indoor fan operating failure | (1) | Fan motor failure | (2) Contact failure at connector |
| (3) Indoor PCboard failure | ||||||||
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| E08 | (1) |
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| Indoor | (2) | Outdoor PCboard failure |
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| E09 | (1) | Service valve not opened. |
| (2) Shortage of refrigerant |
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| E10 | DC compressor drive circuit failure | (1) | Open phase | (2) Outdoor PCboard failure |
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| E11 | Outdoor fan operating failure | (1) | Fan motor failure | (2) Contact failure at connector |
| (3) Outdoor PCboard failure | ||||||||
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| Outdoor system communications failure | (1) | (2) Blown fuse | (3) Power Relay failure |
| (4) Outdoor PCboard failure | ||||||||
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| E12 | OLR operation | (5) | Compressor failure |
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| Outdoor power supply open phase |
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| Outdoor coil freezing | * See detailed flowchart in this section. |
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| E13 | (1) | Indoor fan system failure | (2) Shortage of refrigerant | (3) | ||||||||||
TIMER | BLINKING (3 SEC. INTERVAL) | |
LAMP | ||
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FLOAT SWICTH (FS) IS ACTIVED.
(1) DRAIN PUMP FAILURE (2) FS FAILURE (3) CHOKED DRAIN HOSE
7
