Haier D Series User Manual

 Service diagnosis
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Domestic air conditioner
10.4.10 The communication fault between indoor and outdoor
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Indoor display E7: Outdoor display LED1 flash 15 times
Communication is detected by checking the indoor PCB and the outdoor PCB
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The outdoor PCB broken leads to communication fault
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The indoor PCB broken leads to communication fault
Ŷ Communication wiring disconnected
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The indoor PCB is broken
Ŷ The outdoor PCB is broken
Ŷ The Module PCB is broken
* Caution Be sure to turn off power switch before connect or disconnect connector, or
else parts damage may be occurred.
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LED LED 1 LED 2 Solution
ON/OFF
OFF ON
Outdoor PCB fault
ON/OFF
ON ON
This is caused by Outdoor PCB or Indoor PCB
fault. Change one part firstly, if still unsolved,
change another one
ON/OFF
OFF OFF
This is caused by Outdoor PCB or Power module
fault. Change one part firstly, if still unsolved,
change another one
NO
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Fix the connect cable
1.Check whether the connect cable is bad connection.
2. Check whether the LN wire reversal connection
3.Check whether the communication wire connection is tight
Yes
Check the outdoor PCB
LED
Method of
Malfunction
Detectio
n
Malfunction
Detection
Conditions
Troubleshooti
ng
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Supposed
Causes
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Haier D Series Specifications

General

Brand	Haier
Model	D Series
Category	Air Conditioner
Language	English