Meaning Of Alarm Messages - Panasonic U-36LE1U6 Service Manual

6. Meaning of Alarm Messages

Possible cause of malfunction
Serial Improper setting.
communication
errors
Mis-setting
Activation of Protective device in indoor unit
protective is activated.
device
1
Protective device in outdoor unit
is activated.
Thermistor Indoor thermistor is either open
fault or damaged.
Outdoor thermistor is either
open or damaged.
EEPROM on indoor unit PCB failure
Protective Protective device for compressor
device for No. 1 is activated.
compressor is
activated
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 2 or more indoor units
controllers which have operation
mode priority 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 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 fan motor is activated.
Improper wiring connections of ceiling panel.
Float switch is activated.
Operation of protective function of fan inverter.
O sensor (detects low oxygen level) activated.
2
Compressor thermal protector is activated.
Power supply voltage is unusual. (The voltage is more than 260 V
or less than 160 V between L1 and L2 phase.)
Incorrect discharge temperature.
High pressure switch is activated.
Detective phase (3-phase outdoor unit only)
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.
Overcurrent at time of compressor runs more than 80 Hz (DCCT
secondary current or ACCT primary current is detected at a time
other than when IPM has tripped.)
IPM trip (IPM current or temperature)
Inverter for compressor is unusual. (DC compressor does not
operate.)
Indoor coil temp. sensor (E1)
Indoor coil temp. sensor (E2)
Indoor coil temp. sensor (E3)
Indoor suction air (room) temp. sensor (TA)
Indoor discharge air temp. sensor (BL)
Compressor discharge gas temp. sensor (TD)
Outdoor No. 1 coil liquid temp. sensor (C1)
Outdoor air temp. sensor (TO)
Compressor suction port temperature sensor (TS)
High pressure sensor
EEPROM on the outdoor unit PCB is a failure.
Current is not detected when comp. is ON.
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Priority set remote controller
Non-priority set remote controller
Test Run
Alarm
message
L02
<L03>
L04
L05
L06
L07
L08
<<L09>>
L10
L17
L18
<<P01>>
<<P09>>
<<P10>>
P12
P14
P02
P03
P04
P05
P16
P22
P26
H31
P29
<<F01>>
<<F02>>
<<F03>>
<<F10>>
<<F11>>
F04
F07
F08
F12
F16
F29
F31
H03