Panasonic U-4LE1E5 Instrucciones De Instalación página 20

7-6. Meaning of Alarm Messages
Table of Self-Diagnostics Functions and Description of
Alarm Displays
Alarm messages are indicated by the blinking of LED 1 and 2
(D302, D303) on the outdoor unit PCB. They are also displayed
on the wired remote controller.
●
Viewing the LED 1 and 2 (D302 and D303) alarm displays
LED 1 LED 2
EN
Alarm display
LED 1 blinks M times, then LED 2 blinks N
times. The cycle then repeats.
Alternating
( : Blinking)
Possible cause of malfunction
Remote controller
is detecting error
signal from indoor
unit.
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".)
Indoor unit
communication
error of group
control wiring.
Alarm contents
M = 2: P alarm 3: H alarm 4: E alarm
5: F alarm 6: L alarm
N = Alarm No.
Example: LED 1 blinks 2 times, then
LED 2 blinks 17 times. The cycle then
repeats. Alarm is "P17".
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 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
CN-A.ADD is shorted while
other RC line is executing auto
address operation.
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.
Error of sub outdoor unit in
receiving serial communication
signal from main outdoor unit.
Error of main indoor unit in
receiving serial communication
signal from sub indoor units.
Possible cause of malfunction
Improper setting.
Alarm
message
<E01>
<E02>
<<E03>>
Protective device
in outdoor unit is
activated.
E04
<E06>
E08
Protective device
<<E09>>
in outdoor unit is
activated.
E12
E15
E16
E20
E24
E25
E26
E29
E18
32
18
message
This alarm message shows
when the indoor unit for
multiple-use is not connected
to the outdoor unit.
Duplication of main indoor
unit address setting in group
control.
Duplication of outdoor R.C.
address setting.
There are Priority set
2 or more remote
indoor units controller
controllers
which have
Non-priority
operation
set remote
mode priority
controller
in 1 refrigerant
circuit.
Group control wiring is
connected to individual control
indoor unit.
Indoor unit address is not set.
Capacity code of indoor unit is
<<L09>>
not set.
Capacity code of outdoor unit
is not set.
Mis-matched connection of
outdoor units which have
different kinds of refrigerant.
4-way valve operation failure
Thermal protector in indoor unit
<<P01>>
fan motor is activated.
Improper wiring connections of
<<P09>>
ceiling panel.
Float switch is activated. <<P10>>
Operation of protective function
<<P12>>
of fan inverter
Compressor thermal protector
is activated.
Power supply voltage is
unusual. (The voltage is more
than 260 V or less than 160 V
between L and N phase.)
Incorrect discharge
temperature. (Comp. No. 1)
Power supply circuit failure,
missing-phase detection.
Forgot to open service valve
O sensor (detects low oxygen
2
level) activated.
Compressor running failure
resulting from missing phase
in the compressor wiring, etc.
(Start failure not caused by
IPM or no gas.)
Outdoor unit fan motor is
unusual.
IPM trip (IPM current or
temperature)
Missing-phase/reverse-phase
in the compressor wiring,
Compressor start-up failure
(Overcurrent at time of INV
compressor starts up, etc.)
continued
Alarm
L02
<L03>
L04
L05
L06
L07
L08
L10
L17
L18
P02
P03
P05
P13
P14
P16
P22
H31
P29