Haier HSU-18HEA03/R2(DB)-I User Manual

72
Domestic air conditioner
HSU-18HEA03/R2(DB)-I
Service Diagnosis
7.3.13 Communication error between the indoor and outdoor units
Indoor Display
E7
Method of The date received from the another unit in indoor unit-outdoor unit signal transmission is
Checked whether is normal
Malfunction abnormal fan motor operation
Detection
Malfunction
when the date sent from the another unit cannot be received normally
Decision
Conditions
Supposed Causes
Ƶ indoorunit-outdoor unit signal . transmission error due to wiring error
Ƶ Faulty PCB
Troubleshooting
* Caution Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
NO
˄A˅
Restart the a/c and it
becomes normally.
If starting up normally, but
malfunction occurs again
after a while
Check whether the linking cable
between the indoor and outdoor
is well connected or whether its
core wires are well insulated.
Yes
Yes
Yes
No
No
The outdoor mainboard needs
dehumidification.
The outdoor mainboard
needs dedust.
1. Reconnect the linking cable;
2. Replace the linking cable with
new one.

Haier HSU-18HEA03/R2(DB)-I Specifications

General

Brand	Haier
Model	HSU-18HEA03/R2(DB)-I
Category	Air Conditioner
Language	English