Haier AB072MRERA - Page 584

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Failure Denition
1. Failures and Remedies
2. In case that any of the following failures occur, please take measures below in the rst place and then contact
concerned distributors.
3. Heat Reclaim Ventilation Failure Codes: (indicated only on wired controller matched with heat reclaim ventilation)
Check against following symptoms in case that unit does not run normal.
When unusual conditions (e.g., burnt smell) happen to heat exchanger, please immediately shut off power and
contact concerned distributors.
Under such conditions, continued operation may lead to failure, electric shock and re accident.
When safety devices, such as fuse, breaker or creepage breaker, frequently jump off, or switch cannot work as
usual, do not turn on power.
Remedy: Keep Power Off
When control buttons fail, turn off main power switch.
When failure codes below is indicated on wired controller, please immediately stop operation, shut off manual
power switch and contact concerned distributors or contact after service staff.
Service job shall be undertaken by specialists. In case of other failures, please stop operation and inform
concerned distributors.
Debugging Prior to Operation:
Recheck after completing all installation work. While rechecking, refer to all installing notices in this manual. In case
of any inconsistency, please make immediate correction. After normal operation is conrmed, the manual shall be
kept carefully by users.
Before operating the unit, users shall carefully read the manual; when the unit is to be resold to other new users,
please transfer novice and manual to new users to facilitate future service.
Symptoms Causes Remedies
Total breakdown
Power devices fail? Restart after service
Fuse burnt out or breaker cut off? Replace fuse or reset breaker
Standby indicator activated?
The unit is right in the prewarming or precooling
process prior to running status (refer to Wire
Control Button Denition).
Low air displacement
and high noise level.
Filter or heat exchange components
blocked?
Refer to "Maintenance"
High air displacement
and high noise level.
Filter or heat exchange components
installed in prescribed positions?
Refer to "Maintenance"
Name Code Denition
Indoor Ambient Temperature Sensor Failure E1 Indoor ambient temperature sensor fails
Outdoor Ambient Temperature Sensor Failure E2 Outdoor ambient temperature sensor fails
Limit Switch 1 Failure E3 Air door adjustor 1 or relevant parts fail
Wired Controller and PC Panel Communication Failure E8
Communication connections improper or control
wire control, PC panel damaged
CATUION