Panasonic U-8ME1E8 Mode D'emploi page 29

Possible cause of malfunction
Activation of Protective device in indoor unit is Thermal protector in indoor unit fan motor is activated.
protective device activated.
Improper wiring connections of ceiling panel.
Float switch is activated.
Operation of protective function of fan inverter.
Activation of Protective device in outdoor unit is Compressor thermal protector is activated.
protective device 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)
High pressure switch is activated.
Negative (defective) phase.
O sensor (detects low oxygen level) activated
2
DCCT overcurrent or ACCT overcurrent
Incorrect discharge temperature. (Comp. No. 2)
Compressor 3 discharge temp. failure
High load alarm
Outdoor unit fan motor is unusual.
IPM trip (IPM current or temperature)
Inverter for compressor is unusual. (DC compressor does not operate.)
Thermistor fault Indoor thermistor is either open or Indoor coil temp. sensor (E1)
damaged.
Indoor coil temp. sensor (E2)
Indoor coil temp. sensor (E3)
Indoor suction air (room) temp. sensor (TA)
Indoor discharge air temp. sensor (BL)
Outdoor thermistor is either open Comp. No. 1 discharge gas temp. sensor (DISCH1)
or damaged.
Comp. No. 2 discharge gas temp. sensor (DISCH2)
Outdoor No. 1 coil gas temp. sensor (EXG1)
Outdoor No. 1 coil liquid temp. sensor (EXL1)
Outdoor air temp. sensor (AIR TEMP)
Compressor intake port temperature sensor (RDT)
High pressure sensor. Negative (defective) N phase.
Low-pressure sensor failure
Compressor 3 discharge temp. sensor failure (DISCH3)
Outdoor No. 2 coil gas temp. sensor (EXG2)
Outdoor No. 2 coil liquid temp. sensor (EXL2)
EEPROM on indoor unit PCB failure
Protective device Protective device for compressor EEPROM on the main or sub outdoor unit PCB has failed.
for compressor is No. 1 is activated.
Current is not detected when comp. No. 1 is ON.
activated
Protective device for compressor Compressor No. 2 current trouble (overcurrent)
No. 2 is activated.
Compressor No. 2 current trouble (locked)
Compressor No. 2 CT sensor disconnected or short circuit
Compressor No. 2 discharge temp. sensor disconnected
Protective device for compressor Compressor No. 3 current trouble (overcurrent)
No. 3 is activated.
Compressor No. 3 current trouble (locked)
Compressor No. 3 CT sensor disconnected or short circuit
Compressor No. 3 discharge temp. sensor disconnected
Low pressure switch is activated.
Oil sensor fault. Comp. No. 1 oil sensor
(Disconnection, etc.)
Comp. No. 2 oil sensor
Oil sensor (connection) failure
SUPPLEMENT
Alarm
message
<<P01>>
<<P09>>
<<P10>>
P12
P02
P03
P04
P05
P14
P16
P17
P18
P20
P22
H31
P29
<<F01>>
<<F02>>
<<F03>>
<<F10>>
<<F11>>
F04
F05
F06
F07
F08
F12
F16
F17
F22
F23
F24
F29
F31
H03
H11
H12
H13
H15
H21
H22
H23
H25
H06
H08
H27
H28
Continued
53
Alarm messages displayed on system controller
Serial Error in transmitting serial Indoor or main outdoor unit is not operating correctly.
communication communication signal Mis-wiring of control wiring between indoor unit, main outdoor unit
errors and system controller.
Mis-setting
Error in receiving serial Indoor or main outdoor unit is not operating correctly.
communication signal Mis-wiring of control wiring between indoor unit, main outdoor unit
and system controller.
CN1 is not connected properly.
Activation of Protective device of sub indoor When using wireless remote controller or system controller, in order
protective unit in group control is to check the alarm message in detail, connect wired remote controller
device activated. to indoor unit temporarily.
NOTE
1. Alarm messages in << >> do not affect other indoor unit operations.
2. Alarm messages in < > sometimes affect other indoor unit operations depending on the fault.
C05
C06
P30
54