Carrier XCT7 40VH A-7G Series - Failure Definition

Installing Heat Reclaim Ventilation
Failure Denition
1. Failures and Remedies
Check against following symptoms in case the unit does not run normal.
Symptoms Causes Remedies
Total Breakdown
Power devices fail? Restart after service
Fuse burnt out or breaker cut o󰀨? 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"
2. In case that any of the following failures occur, please take measures below in the rst place and then
contact concerned distributors.
When unusual conditions (e.g., burnt smell) happen to heat exchanger, please immediately shut o󰀨 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 o󰀨, or switch cannot work as
usual, do not turn on power.
Remedy: Keep Power O󰀨
When control buttons fail, turn o󰀨 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 o󰀨 manual
power switch and contact concerned distributors or contact after service sta󰀨.
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 PCB Communication Failure E8 Communication connections improper or
control wire control, PCB damaged
CAUTION: 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 invoice and manual to new users to facilitate future service.
ENGLISH
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