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ECOi-Geräte – ECOi ME1

 

 Alarm Codes (Störungscodes)

With type 8HP, the INV compressor is compressor 1 only.

With types 10HP, 12HP, 14HP and 16HP, the INV compressor is compressor 1, and the constant-speed compressors (AC1) are compressors 2.

With types 18HP and 20HP, the INV compressor is compressor 1, and the constant-speed
compressors (AC1, AC2) are compressors 2 and 3.

Alarm Code Alarm meaning
E06 Outdoor unit failed to receive serial communication signals from indoor unit.
E12 Automatic address setting start is prohibited.
E15 Automatic address setting alarm (too few units)
E16 Automatic address setting alarm (too many units)
E20 No indoor units at automatic address setting.
E24 Outdoor unit (INV) failed to receive communications from another outdoor unit (constant-speed).
E25 Outdoor unit address setting failure (duplication)
E26 Mismatch in outdoor unit quantity
E29 Outdoor unit failed to receive communication from outdoor unit (main)
E31 Communication error between the microcomputers
F04 Compressor 1 discharge temperature sensor trouble
F05 Compressor 2 discharge temperature sensor trouble
F22 Compressor 3 discharge temperature sensor trouble
F06 Gas temperature sensor trouble at outdoor heat exchanger 1 (In)
F07 Liquid temperature sensor trouble at outdoor heat exchanger 1 (Out)
F08 Outdoor air temperature sensor trouble
F12 Compressor intake temperature sensor trouble
F16 High-pressure sensor trouble
F17 Low-pressure sensor trouble
F23 Gas temperature sensor trouble at outdoor heat exchanger 2 (In)
F24 Liquid temperature sensor trouble at outdoor heat exchanger 2 (Out)
F31 Outdoor unit non-volatile memory (EEPROM) trouble
H11 Constant speed compressor 2 overcurrent alarm
H12 Constant speed compressor 2 lock current alarm
H03 Compressor 1 CT sensor disconnected or short-circuit
H05 Compressor 1 discharge temperature sensor disconnected
H06 Low-pressure switch activated
H08 Compressor 1 oil detection sensor (connection) trouble
H13 Compressor 2 CT sensor disconnected or short-circuit
H15 Compressor 2 discharge temperature sensor disconnected
H21 Compressor 3 overcurrent alarm
H22 Compressor 3 lock current alarm
H23 Compressor 3 CT sensor disconnected or short-circuit
H25 Compressor 3 discharge temperature sensor disconnected
H27 Compressor 2 oil detection sensor (connection) trouble
H28 Compressor 3 oil detection sensor (connection) trouble
H31 HIC trouble alarm
L04 Outdoor system address duplication
L10 Outdoor unit capacity not set
L17 Outdoor unit model mismatch
L18 4-way valve operation failure
P02 Compressor thermal protector is activated.(trip only and no alarm)
P03 Compressor 1 discharge temperature trouble
P04 High-pressure switch activated
P05 Reverse phase (or missing phase) detected
P14 O2 sensor differential alarm (Only when optional O2 sensor supplied)
P16 Compressor 1 (INV) overcurrent alarm
P17 Compressor 2 discharge temperature trouble
P18 Compressor 3 discharge temperature trouble
P20 High load alarm
P22 Fan motor trouble
P29 Inverter compressor missing phase or lock alarm

 


Blinking Inspection Display on the Remote Controller

AchtungCAUTION
Currently the blinking inspection display can be displayed only on the wired remote controller and system remote controller.

Blinking inspection display (1) (Automatic backup)

Alarm Code (Blinking inspection display)
Alarm meaning Automatic backup is in progress. A/C units can be operated.
Status: The compressor at one of the outdoor units where the outdoor unit fan is running should be operating.
 * Blinking inspection display also occurs when seizing of the compressor magnet SW is detected. Because this may also be the case, refer to “Blinking inspection display (compressor magnet SW seizing detection).”
Alarm conditions When alarm P16, P22, P29, Hx1, Hx2, or H31 has occurred, correcting the control device (remote controller, etc.) input engages this mode.
Probable cause Because alarm P16, P22, P29, Hx1, Hx2, or H31 has occurred, check the alarm history then refer to the corresponding items.
Correction Follow the instructions in the corresponding items to correct the trouble.
Recovery After repairing the malfunctioning locations, reset the power for the system (all outdoor units).
Caution: Automatic backup mode will not be canceled until the power is reset.
Notes

Automatic backup mode is not engaged in cases of alarms other than those listed above.
Reasons:

There is no need for automatic backup if recovery is possible by correcting the remote controller input.
With alarms for which automatic recovery is possible (such as sensor alarms), the presence of electrical noise may result in a new alarm. However, it is believed that this occurs for a comparatively short time only. In these cases, a mode (automatic backup mode) that limits operation may be engaged.
Control is not possible when a communications system alarm has occurred. Automatic backup mode is not engaged in order to avoid causing secondary damage.

Blinking inspection display (2) (compressor magnet SW seizing detection)

AlarmCode(Blinking inspection display)
Alarm meaning Compressor magnet SW seizing detected
Status: Although an outdoor unit exists where the outdoor unit fan is running, no compressors in the system are operating.
☆Because the fan is running only at the outdoor unit where seizing was detected, check the corresponding outdoor unit.
* The fan may also run on its own when fan cracking prevention control is in effect or when snowfall sensor input is present. Therefore monitor for approximately 10 minutes if the outdoor unit fans are operating at multiple units.
Alarm conditions

Current is detected in the CT circuit when the compressor is stopped.

  1. This control is not engaged for thefirst 30 seconds after the compressor turns
    ON → OFF.
  2. For 1 minute following the first 30 seconds after the compressor turned ON → OFF, the threshold for the detected current is 10 A or more continuing for 2 seconds.
  3. All times other than the above:
    • If the low-pressure SW has not activated, the threshold for the detected current is 7A or more continuing for 5 seconds.
    •If the low-pressure switch has activated, the threshold for the detected current is 7A or more continuing for 2 seconds.
Probable cause 1. Magnet SW malfunction
  • The magnet SW has seized, and the compressor is continuing to run.
    → Even when the power is turned OFF, the primary side and secondary side contactsremain together.
  • The conditions of magnet SW operation are poor (difficult to open).
    → When a magnet SW is used in a DC circuit, it may be difficult for the SW to open at times. In an AC circuit the magnet SW should open instantaneously as long as the current is within the allowable range. However, this kind of trouble can occur if excessive current flows, and may prevent the SW from opening.

2. CT circuit failure or PCB failure (A/D failure)

  • CT circuit contact failure
    → Check that the connector is not partially disconnected.
  • Wiggle the connector to check the connection.*
    * These symptoms will not occur if the connector is completely disconnected or the wire is cut. In these cases alarm Hx3 occurs.
  • Current of 7A or higher was detected although the compressor was stopped, or a higher current was detected at occasional intervals.
  • The compressor continues to operate at a time when the outdoor unit should be stopped (such as when all indoor units are stopped).
    → Check whether or not 200 V is output from the PCB to the magnet SW. If the voltage is output, there is a PCB failure.

3.Installation error

  • CT2 connector is connected to the compressor 3 side
  • CT2 circuit is connected to the compressor 3 side
  • CT3 connector is connected to the compressor 2 side
  • CT3 circuit is connected to the compressor 2 side

4. Electrical noise

Correction
  1. Replace the CT circuit.
  2. Replace the magnet SW.
  3. Replace the PCB.
    If the above probable causes are not the cause of the alarm, it is possible that in rare cases the alarm may be caused by the effects of noise. See notes.
Recovery After repairing the malfunctioning locations, reset the power for the system (all outdoor units).
Caution: Automatic backup mode will not be canceled until the power is reset.
Notes

The effects of electrical noise are difficult to identify unless a PC is connected and the conditions are monitored for a long period of time.


 

 

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