Panasonic CU-8ME1XPK - Malfunction of Transmission between Remote Controller and Indoor Unit

Troubleshooting PACD011001C2
184 Troubleshooting Urban Multi “MX1, ME1 Series” Using R-22
3.29 Malfunction of Transmission between Remote Controller and Indoor Unit
Remote Controller
Display
U5
U5U5
U5
Supposed Causes
„
Malfunction of indoor unit remote controller transmission
„
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
(VF055)
NO
YES
YES
NO
Replace indoor unit PC board.
Set one remote controller to
"SLAVE"; turn the power supply off
once and then back on.
There is possibility of malfunction
caused by noise. Check the
surrounding area and turn on
again.
NO
NO
Using
2-remote controllers
control.
All indoor
PC board microcomputer
monitors blink.
YES
Multi-core
cable is used for the indoor
unit remote controller
transmission
wiring.
Operation
returns to normal when the
power is turned off
momentarily.
YES
YES
SS1
of both remote controllers is set
to "MASTER."
NO
Switch to double-core independent
cable.
Defect of remote controller PC
board or indoor unit PC board.
Replace whichever is defective.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.