Transmission Error Between Remote Controller And Indoor Unit - Daikin ZQG71~140L7V1B Service Manual

Troubleshooting by Remote Controller
4.33 Transmission Error Between Remote Controller and
Indoor Unit
U5
Remote
Controller
Display
Applicable
All models of indoor unit
Models
Method of Error The error is generated when the micro-computer detects that the transmission between the
Detection indoor and the outdoor unit is not normal over a certain amount of time.
Error Decision
Normal transmission does not continue for specified period.
Conditions
Supposed
 Connection of two main remote controllers (when using 2 remote controllers)
 Defective remote controller
Causes
 Defective of indoor unit PCB
 External factor (Noise, etc.)
Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Using
2-remote controllers
control.
NO
All indoor
PCB micro-computer
monitors blink.
YES
Replace the remote controller
Is it normal?
NO
Replace the indoor unit PCB, and
then restart.
Is it normal?
NO
184
SS1 of
YES
both remote controllers
is set to "MAIN."
NO
Operation
returns to normal when
NO
the power is turned off
momentarily.
YES
YES
YES
YES
Set one remote controller to "SUB";
turn the power supply off once and
then back on.
NO
Replace indoor unit PCB.
There is possibility of error caused
by noise. Check the surrounding
area and turn on again.
Normal
Normal
There is possibility of error caused
by noise. Check the surrounding
area and turn on again.
ESIE12-06
Service Diagnosis