HTW MI2 Serie Manuel D'installation page 53

16.4 Error Codes
With the exception of a mode conflict error, contact your supplier or service engineer if any of the error codes listed in the following table are
displayed on the unit's display panel. If the mode conflict error is displayed and persists, contact your supplier or service engineer. These errors
should only be investigated by a professional technician. The descriptions are provided in this manual for reference only.
Content
Mode conflict
Communication error
between indoor and outdoor
units
Indoor ambient temperature
sensor (T1) error
Indoor heat exchanger
mid-point temperature
sensor (T2) error
Indoor heat exchanger
outlet temperature sensor
(T2B) error
Fan error
EEPROM error
Indoor EEV coil error
Outdoor unit error
Water level error
The indoor unit has not been
assigned an address
Display output
Possible causes
The indoor unit's operating mode conflicts with that of the outdoor

E0
units.
Communication wires between indoor and outdoor units not

connected properly.
Interference from high voltage wires or other sources of

E1
electromagnetic radiation.
Communication wire too long.

Damaged main PCB.

E2
E3  Temperature sensor not connected properly or has malfunctioned.
 Damaged main PCB.
E4
 Fan stuck or blocked.
 Fan motor not connected properly or has malfunctioned.
E6
 Power supply abnormal.
Damaged main PCB.

E7  Damaged main PCB.
 Line loosened or broken.
Eb  The electronic expansion valve in stuck.
Damaged main PCB.

Ed  Outdoor unit error.
 Water level float stuck.
 Water level switch not connected properly.
EE
 Damaged main PCB.
 Drain pump has malfunctioned.
FE  Indoor unit has not been assigned an address.
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