Trouble Diagnosis; Contents Of Remote Controller Switch Alarm Display - Panasonic U-8MF2E8 Service Manual

1. Contents of Remote Controller
Switch Alarm Display
Serial Remote controller is detecting
communication error signal from indoor unit.
errors
Mis-setting
Indoor unit is detecting error signal from remote controller (and system controller).
Indoor unit is detecting error
signal from main outdoor unit.
Improper setting of indoor unit
or remote controller.
During auto address setting,
number of connected units
does not correspond to
number set.
When turning on the power
supply, number of connected
units does not correspond to
number set.
(Except R.C. address is "0.")
5
Improper setting.
Possible cause of malfunction
Error in receiving serial communication signal.
(Signal from main indoor unit in case of group control)
Ex: Auto address is not completed.
Error in transmitting serial communication signal.
Error in receiving serial communication signal.
When turning on the power supply, the number of connected
indoor units does not correspond to the number set.
(Except R.C. address is "0.")
Error of the main outdoor unit in receiving serial
communication signal from the indoor unit.
Indoor unit address setting is duplicated.
Remote controller address connector (RCU. ADR) is
duplicated. (Duplication of main remote controller)
Starting auto address setting is prohibited.
This alarm message shows that the auto address connector
CN30 is shorted while other RC line is executing auto
address operation.
Error of main indoor unit in receiving serial communication
signal from sub indoor units.
Error in auto address setting. (Number of connected indoor
units is less than the number set.)
Error in auto address setting. (Number of connected indoor
units is more than the number set.)
No indoor unit is connected during auto address setting.
Main outdoor unit is detecting error signal from sub outdoor
unit.
Error of outdoor unit address setting.
The number of connected main and sub outdoor units do not
correspond to the number set at main outdoor unit PCB.
Improper wiring between main outdoor unit and sub-unit.
Error of sub outdoor unit in receiving serial communication
signal from main outdoor unit.
Serial transmission failure of outdoor unit.
Communication failure with MDC
This alarm message shows when an indoor unit for
multiple-use is not connected to the outdoor unit.
Duplication of main indoor unit address setting in group
control.
Group control wiring is connected to individual control indoor
unit.
Indoor unit address is not set.
Capacity code of indoor unit is not set.
Duplication of outdoor R.C. address setting.
Capacity code of outdoor unit is not set.
Incorrect wiring of remote group control wiring
(in case of shared solenoid valve kit)
Mis-matched connection of outdoor units that have different
kinds of refrigerant.
5 - 2
3WAY SYSTEM

Trouble Diagnosis

ON: Blinking: OFF:
Wired
Wireless
remote
remote controller
control
receiver display
display
Operating lamp
<E01>
blinking
<E02>
<<E03>>
Heating ready lamp
blinking
E04
<E06>
E08
<<E09>>
Operating lamp
blinking
E12
E18
E15
E16
E20
Heating ready lamp
E24
blinking
E25
E26
E27
E29
E30
E31
L02
Operating and heating
<L03>
ready lamps blinking
simultaneously
L07
L08
<<L09>>
L04
Operating and heating
L10
ready lamps blinking
simultaneously
L11
L17
Continued