Haier AB072MRERA Service Manual page 584

Failure Definition
1. Failures and Remedies
Check against following symptoms in case that unit does not run normal.
Symptoms
Total breakdown
Low air displacement
and high noise level.
High air displacement
and high noise level.
2. In case that any of the following failures occur, please take measures below in the first place and then contact
concerned distributors.
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 fire 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.
3. Heat Reclaim Ventilation Failure Codes: (indicated only on wired controller matched with heat reclaim ventilation)
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.
Indoor Ambient Temperature Sensor Failure
Outdoor Ambient Temperature Sensor Failure
Limit Switch 1 Failure
Wired Controller and PC Panel Communication Failure
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 confirmed, 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.
Causes
Power devices fail?
Fuse burnt out or breaker cut off?
Standby indicator activated?
Filter or heat exchange components
blocked?
Filter or heat exchange components
installed in prescribed positions?
Name
Restart after service
Replace fuse or reset breaker
The unit is right in the prewarming or precooling
process prior to running status (refer to Wire
Control Button Definition).
Refer to "Maintenance"
Refer to "Maintenance"
Code
E1 Indoor ambient temperature sensor fails
E2 Outdoor ambient temperature sensor fails
E3 Air door adjustor 1 or relevant parts fail
Communication connections improper or control
E8
wire control, PC panel damaged
CATUION
576
Remedies
Definition