E01 Error in receiving serial communication signal (Signal from main indoor unit in case of group control) Auto address is not completed Outdoor system address, indoor system address, or indoor unit individual/main/sub setting is not set (Automatic address setting is not completed)
E02 Error in transmitting serial communication signal
E03 Indoor unit is detecting error signal from remote controller (and system controller)
E08 Indoor unit address setting is duplicated
E09 Remote controller setting is duplicated
E10 Error in transmitting serial communications signal
E11 Main unit duplication in simultaneous-operation multi control (detected by outdoor unit)
E14 Error in receiving serial communications signal
E04 Error in transmitting serial communications signal
E05 Error in receiving serial communications signal (including unit quantity verification failure)
E06 Error in transmitting serial communications signal
E07 Indoor unit capacity too low
E15 Indoor unit capacity too high
E16 No indoor units connected
E20 Error in transmitting serial communications signal
E17 Error in receiving serial communications signal
E18 Communications failure with MDC
E31 Indoor unit group settings error
L01 Indoor/outdoor unit type mismatch
L02 Main unit duplication in group control (detected by indoor unit)
L03 Outdoor unit address duplication (system address)
L04 Group wiring connected for independent indoor unit
L07 Address not set or group not set
L08 Indoor unit capacity not set
L09 Outdoor unit capacity not set or setting error
L10 Miswiring in group control wiring
L11 Indoor unit type setting error (capacity)
L13 Ceiling panel connection failure
P09 Fan protective thermostat
P01 Float switch
P10 Discharge temperature trouble
P03 Open phase detected, AC power trouble
P05 No gas
P15 4-way valve locked
P19 High cooling load
P20 Outdoor fan trouble
P22 Inverter compressor trouble (HIC PCB)
P26 Inverter compressor trouble (MDC)
P29 Simultaneous-operation multi control trouble
P31 Compressor current failure (overload)
H01 Indoor heat exchanger temperature sensor (E1)
F01 Indoor heat exchanger temperature sensor (E2)
F02 Indoor temperature sensor
F10 Discharge temperature (TD)
F04 Outdoor heat exchanger temperature (C1)
F06 Outdoor heat exchanger temperature (C2)
F07 Outdoor air temperature (TO)
F08 Intake temperature (TS)
F12 Indoor EEPROM error
F29 Outdoor EEPROM error
F31 Outdoor EEPROM error
| Remote controller alarm display | Alarm contents | Judgment condition | Clear condition | Judgment and correction |
| PO3 | Abnormal discharge temperature •Discharge temp. detected at or above the specified value | Stops when temp. exceeds 111°C. | Recovery at restart | 1. Check refrigerant cycle (gas leak). 2. Electronic control valve trouble 3. Check tubing sensor (TD). |
| P05 | Missing phase detected. (CT disconnected or AC power trouble) | Current value sent from MDC on outdoor unit control PCB is low. No AC power input for 3 minutes or longer: pre-trip - 5 | Recovery at restart | 1. Check R/S/T power. 2. Check inverter control PCB. 3. Check outdoor unit control PCB. |
| P15 | nsufficient gas level detected. | The following conditions continue for 1 minute. •Discharge temp. is 95°C or higher. •Electronic control valve is at step 480. •Current value from MDC is 1.7 A (3-phase) or 1.0 A (1-phase) or less. | Recovery at restart | Check refrigerant cycle (gas leak). |
| P19 | 4-way valve locked •Judgment occurs after compressor has been ON for 5 minutes. | Indoor heat exchanger temp. drops although compressors are ON in heating mode: [min(E1, E2)] ≤10°C. Indoor heat exchanger temp. rises although compressors are ON in cooling mode: E2 ≥40°C | Recovery at restart | 1. Check 4-way valve. 2. Check 4-way valve wiring. 3. Check outdoor unit control PCB. |
| P20 | High-pressure protection trouble detected from cooling high-load C2 temp. | Temp. exceeds 64°C and subsequently does not drop to 55°C or below. •Continuously for 30 seconds →Alarm is output when this occurs once. •Continuously for less than 30 seconds →Inverter stops. | Recovery at restart | 1. Refrigerant cycle overload operation 2. Outdoor coil temperature sensor C2 |
| P22 | Outdoor unit fan motor trouble •Inverter protection circuit was activated, or lock was detected, at outdoor unit fan motor. | Inverter stops after alarm is detected | Recovery at restart | 1. Position detection trouble 2. Overcurrent protection circuit at outdoor unit fan motor was activated. •Check outdoor unit control PCB. •Refer to outdoor unit fan judgment methods. |
| P26 | Inverter protection circuit was activated, or G-Tr short-circuit (short time: 0.8 s or less) in inverter control | nverter stops after alarm is detected. Alarm is output when inverter stops (pre-trip) consecutively 4 times. | Recovery at restart | 1. Stops immediately when restarted. •Layer short in the compressor 2. Check inverter control PCB. •Wiring trouble |
| P29 | Current detection circuit trouble •AC current value is high even when compressor is stopped. | Inverter stops after alarm is detected. Alarm is output when inverter stops (pre-trip) consecutively 4 times. | Recovery at restart | 1. Stops immediately when restarted. •Layer short in the compressor 2. Check inverter control PCB. •Wiring trouble |
| Compressor motor output trouble, Inverter compressor trouble, MDC trouble | Inverter stops after alarm is detected. | Recovery at restart | 1. Refrigerant cycle trouble, overload operation 2. Loose screws and contact failure between HIC control PCB and radiating plate 3. Cooling failure of radiating plate 4. Check outdoor unit PCB wiring. | |
| Compressor does not run. (Overcurrent protection circuit activates after a certain period of time following compressor start.) | Inverter stops after alarm is detected. | Recovery at restart | 1. Compressor trouble (locked, etc.) •Replace the compressor. 2. Compressor wiring trouble (missing phase) | |
| Compressor breakdown •Starts to operate but operating frequency drops and compressor stops. | Inverter stops after alarm is detected. | Recovery at restart | 1. Check power voltage: AC 200 V ±20 V. 2. Refrigerant cycle overload operation 3. Check AC current detection circuit. | |
| Inverter control PCB position detection circuit trouble | Inverter stops after alarm is detected. | Recovery at restart | Position detection circuit is activated even when the compressor 3P connector is disconnected and the compressor operated. • Replace the inverter control PCB. | |
| F04 | Disconnection, open circuit, or short circuit in discharge temp. sensor (TD) | Sensor detection trouble (90°C or higher when 15 minutes have elapsed after compressor stopped). (Open circuit) | Automatic recovery | 1. Check discharge temp. sensor (TD). 2. Check outdoor unit control PCB. |
| F06 | Disconnection, open circuit, or short circuit in outdoor heat exchanger temp. sensor (C1) | Open circuit or short circuit | Automatic recovery | 1. Check outdoor heat exchanger temp. sensor (C1). 2. Check outdoor unit control PCB |
| F07 | Disconnection, open circuit, or short circuit in outdoor heat exchanger temp. sensor (C2) | Open circuit or short circuit | Automatic recovery | 1. Check outdoor heat exchanger temp. sensor (C2). 2. Check outdoor unit control PCB. |
| F08 | Disconnection, open circuit, or short circuit in outdoor air temp. sensor (TO) | Open circuit or short circuit | Automatic recovery | 1. Check outdoor air temp. sensor (TO). 2. Check outdoor unit control PCB. |
| F12 | Disconnection, open circuit, or short circuit in intake temp. sensor (TS) | Open circuit or short circuit | Automatic recovery | 1. Check intake temp. sensor (TS). 2. Check outdoor unit control PCB. |
| F31 | EEPROM trouble | Reading/writing failure | Recovery at power reset | 1. Check EEPROM (IC901). 2. Check outdoor unit control PCB. |
| L02 | Mismatch of indoor and outdoor unit types (Espacio, Multi, GHP) | Indoor unit judges that type does not match outdoor unit type. | Recovery at power reset | 1. Check indoor unit EEPROM. 2. Check indoor unit control PCB |
| L04 | Settings failure | Duplicated outdoor unit address (system address) | Automatic recovery | 1. Check outdoor unit system address. 2. Check inter-unit control wiring. |
| L07 | Settings failure | Group control wiring is connected to an independent-control indoor | Recovery at power reset | 1. Check inter-unit control wiring. 2. Check indoor unit EEPROM. |
| L10 | Settings failure | Outdoor unit capacity not set. | Recovery at power reset | Check outdoor unit EEPROM. |
| L13 | Indoor-outdoor unit types | Outdoor unit judges that type does not match indoor unit type. | Recovery at power reset | 1. Check indoor unit EEPROM. 2. Check outdoor unit control PCB. |
| E06 | Outdoor unit detected abnormal signal from indoor unit. | Serial signal receiving failure (including failure to verify No. of units) | Automatic recovery | 1. Check inter-unit control wiring. 2. Check outdoor unit |
| E07 | Outdoor unit sending failure to indoor unit | Serial signal sending failure | Automatic recovery | 1. Check inter-unit control wiring. 2. Check outdoor unit control PCB. |
| E14 | Settings failure | Duplicated master unit in simultaneous-operation multi control (Detected by outdoor unit) | Recovery at power reset | 1. Check inter-unit control wiring. 2. Check indoor unit combination. |
| E15 | Automatic address setting failure | Indoor unit capacity too low. | Recovery at power reset | 1. Check inter-unit control wiring. 2. Check outdoor unit control PCB. |
| E16 | Automatic address setting failure | Indoor unit capacity too high. | Recovery at power reset | 1. Check inter-unit control wiring. 2. Check outdoor unit control PCB. |
| E20 | Automatic address setting failure | Outdoor unit cannot receive any serial signals from indoor units. | Recovery at power reset | 1. Check inter-unit control wiring. 2. Check outdoor unit control PCB. |
| E31 | Communications trouble within unit | No communication possible with MDC for 3 minutes or longer. | Automatic recovery | Check outdoor unit control PCB. |
| H01 | Overcurrent | Inverter stops after alarm is detected. | Recovery at restart | 1. Refrigerant cycle trouble, overload operation 2. Loose screws between HIC control PCB and radiating plate 3. Cooling failure of radiating plate 4. Check outdoor unit PCB wiring. |
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