Transmission Error (Between Remote Controller And Indoor Unit) - Daikin VRV II-Q RQYQ8-48PY1B Service Manual

SiBE341027
2.34 Transmission Error (between Remote Controller and
Indoor Unit)
U5
Remote
Controller
Display
Applicable All indoor unit models
Models
Method of Error Micro-computer checks if transmission between indoor unit and remote controller is normal.
Detection
Error Decision Normal transmission does not continue for specified period.
Conditions
Supposed
Causes
Troubleshooting
Service Diagnosis
Transmission error between indoor unit and remote controller
Connection of two main remote controllers (when using 2 remote controllers)
Defective indoor unit PCB
Defective remote controller PCB
Transmission error caused by noise
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Using 2-remote
controllers control.
NO
All indoor unit PCB
micro-computer
monitors blink.
YES
Replace the remote controller.
Normal
NO
Replace the indoor unit PCB.
Normal
NO
YES
SS1 of both remote
controllers is set to
"MAIN."
NO
Operation returns
NO
to normal when the
power is turned off
momentarily.
YES
YES
YES
Troubleshooting by Remote Controller
YES
Set one remote controller to
"SLAVE"; turn the power
supply off once and then back
on.
NO
Replace the indoor unit
PCB.
The indoor unit PCB is normal.
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.
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