Panasonic U-4LE1E5 Service Manual page 50

1. Self-Diagnostics Function Table
• The outdoor unit maintenance remote controller can be used to check the alarm display.
The number of times that LED 1 and 2 blink on the outdoor unit control PCB can be used to check the alarm
display. (Refer to "Checking the LED 1 and 2 Alarm Display on the Outdoor Unit Control PCB.")
Remote
controller
display
E06 Trouble receiving the signal from the indoor unit at the outdoor unit
E12 Automatic address setting start-prohibit
E15 Automatic address setting alarm (too few units)
E16 Automatic address setting alarm (too many units)
E20 No indoor units when automatic address setting was started
E24 Trouble receiving the signal from the outdoor unit at the relay control unit
E25 Trouble with the outdoor unit address setting
E29 Trouble receiving the signal from the relay control unit at the outdoor unit
E30 Trouble with sending the outdoor unit serial signal
F04 Compressor 1 – Discharge temperature sensor trouble
F07 Outdoor coil liquid temperature sensor trouble
F08 Outside air temperature sensor trouble
F12 Compressor inlet temperature sensor trouble
F16 High-pressure sensor trouble
F31 Outdoor unit non-volatile memory (EEPROM) trouble
H03 Compressor 1 – CT sensor disconnected or short circuit
H31 Compressor HIC alarm (Also check the description of alarm P29.)
L05 Duplicated indoor unit priority (priority indoor unit)
L06 Duplicated indoor unit priority (non-priority indoor unit) and outdoor unit
L10 Outdoor unit capacity not set.
L17 Outdoor unit type mismatch
P03 Compressor 1 – Abnormal discharge temperature
5
P13 Out of step detected
P14 O
2
P16 DCCT or ACCT overcurrent at less than 80 Hz
Outdoor unit fan trouble (IPM damage, overcurrent, inverter trouble, DC fan lock, Hall IC missing
P22
phase)
Missing-phase/reverse-phase in the compressor wiring, Compressor start-up
P29
failure (Overcurrent at time of INV compressor starts up, etc.)
sensor activated.
Self-Diagnostics Function Table
Cause
5-4
Mini VRF SYSTEM
(TD)
(C1)
(TO)
(TS)
(HPS)