U5" Indoor Unit: Malfunction Of Transmission Between; Remote Controller And Indoor Unit - Daikin RTSQ20PY1 Service Manual

SiBE31-801_C
U5
4.49 " " Indoor Unit: Malfunction of Transmission between

Remote Controller and Indoor Unit

U5
Remote
Controller
Display
Applicable All indoor unit models
Models
Method of In case of controlling with 2-remote controller, check the system using micro-computer is signal
transmission between indoor unit and remote controller (main and sub) is normal.
Malfunction
Detection
Malfunction Normal transmission does not continue for specified period.
Decision
Conditions
Supposed
Causes
Troubleshooting
Troubleshooting
Malfunction of indoor unit remote controller transmission
Connection of two main remote controllers (when using 2 remote controllers)
Defect of indoor unit PCB
Defect of remote controller PCB
Malfunction of transmission 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 PCB
micro-computer
monitors blink.
YES
Replace the remote controller.
Normal
NO
Replace the indoor unit PCB.
Normal
NO
Troubleshooting by Indication on the Remote Controller
YES
SS1 of both remote
controllers is set to
"MAIN."
NO
Operation returns to
NO
normal when 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 the indoor unit PCB.
There is possibility of
malfunction caused by noise.
Check the surrounding area
and turn on again.
Normal
Normal
There is possibility of
malfunction caused by noise.
Check the surrounding area
and turn on again.
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