Malfunction Of Transmission Between Remote Controller And Indoor Unit - Panasonic Urban Multi MX1R Series Service Manual

Troubleshooting
3.29

Malfunction of Transmission between Remote Controller and Indoor Unit

U5 U5 U5 U5
Remote Controller
Display
„ Malfunction of indoor unit remote controller transmission
Supposed Causes
„ Connection of two main remote controllers (when using 2 remote controllers)
„ Defect of indoor unit PC board
„ Defect of remote controller PC board
„ Malfunction of transmission caused by noise
Troubleshooting
184
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Using
YES
2-remote controllers
control.
NO
All indoor
NO
PC board microcomputer
monitors blink.
YES
Multi-core
YES
cable is used for the indoor
unit remote controller
transmission
wiring.
NO
SS1
YES
of both remote controllers is set
to "MASTER."
NO
Operation
returns to normal when the
power is turned off
momentarily.
YES
Troubleshooting Urban Multi "MX1, ME1 Series" Using R-22
PACD011001C2
Set one remote controller to
"SLAVE"; turn the power supply off
once and then back on.
NO
Replace indoor unit PC board.
There is possibility of malfunction
caused by noise. Check the
surrounding area and turn on
again.
Switch to double-core independent
cable.
Defect of remote controller PC
board or indoor unit PC board.
Replace whichever is defective.
(VF055)