Panasonic VRF AC Error Codes and Troubleshooting



Indoor unit is detecting error signal from remote controller (and system controller).

Panasonic Mini VRF AC Error Codes and Troubleshooting
Panasonic Mini VRF AC Error Codes and Troubleshooting
Error CodesMeaning
E01Error in receiving serial communication signal.
E02Error in transmitting serial communication signal.
E03Indoor unit is detecting error signal from remote controller.
E04Error in receiving serial communication signal. When turning on the power supply, the number of connected indoor units does not correspond to the number set.
E06Error of the outdoor unit in receiving serial communication signal from the indoor unit.
E08Indoor unit address setting is duplicated.
E09Remote controller address connector.
E12Starting 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.
E15Error in auto address setting.
E16Error in auto address setting.
E20No indoor unit is connected during auto address setting.
E24Main outdoor unit is detecting error signal from sub outdoor unit.
E25Error of outdoor unit address setting.
E26The number of connected main and sub outdoor units do not correspond to the number set at main outdoor unit PCB.
E29Error of sub outdoor unit in receiving serial communication signal from main outdoor unit.
E30Transmission from outdoor unit faulty.
E18Error of main indoor unit in receiving serial communication signal from sub indoor units.
L02This alarm message shows when the indoor unit for multiple-use is not connected to the outdoor unit.
L03Duplication of main indoor unit address setting in group control.
L04Duplication of outdoor R.C. address setting.
L05Priority set remote controller.
L06Non-priority set remote controller.
L07Group control wiring is connected to individual control indoor unit.
L08Indoor unit address is not set.
L09Capacity code of indoor unit is not set.
L10Capacity code of outdoor unit is not set.
L184-way valve operation failure.
P01Thermal protector in indoor unit fan motor is activated.
P09Improper wiring connections of ceiling panel.
P10Float switch is activated.
P12Operation of protective function of fan inverter
P03Incorrect discharge temperature. (Comp. No. 1)
P04The internal circuit of the high pressure switch is dead
P05Power supply circuit failure, missing-phase detection.
P13There is a trouble with the outdoor unit when the liquid valve and the gas valve are closed.
P14O2 sensor (detects low oxygen level) activated
P16 Compressor running failure resulting from missing phase in the compressor wiring, etc.
P22Outdoor unit fan motor is unusual.
H31IPM trip (IPM current or temperature)
P29Missing-phase/reverse-phase in the compressor wiring, Compressor start-up failure
F01Indoor coil temp. sensor (E1)
F03Indoor coil temp. sensor (E3)
F10Indoor suction air (room) temp. sensor (TA)
F11Indoor discharge air temp. sensor (BL)
F04Compressor No. 1 discharge gas temp. sensor (TD)
F07Outdoor No. 1 coil liquid temp. sensor (C1)
F08Outdoor air temp. sensor (TO)
F12Compressor intake port temperature sensor (TS)
F16High pressure sensor failure
F29EEPROM on indoor unit PCB failure
F31EEPROM on the outdoor unit PCB is a failure.
H01Overcurrent of power supply current (CT) sensor
H02PAM failure
H03Power supply current (CT) sensor failure
C05Indoor or main outdoor unit is not operating correctly. Mis-wiring of control wiring between indoor unil, main outdoor unit and system controller.
C06Indoor or main outdoor unit is not operating correctly. Mis-wiring of control wiring between indoor unit, main outdoor unit and system controller. CN1 is not connected properly.
P30When using wireless remote controller or system controller, in order to check the alarm message in detail, connect wired remote controller to indoor unit temporarily.

Panasonic VRF AC Troubleshooting

Panasonic VRF AC Troubleshooting
Panasonic VRF AC Troubleshooting
TroubleCause and correction
The power LED on the outdoor unit control PCB does not turn ON.Check for any errors in the power wiring to the outdoor unit, and check for a missing phase.
LED 1 and 2 on the outdoor unit control PCB do not turn OFF when the outdoor unit power is turned ON, and automatic address setting cannot be started.Check the "Alarm Displays" table and correct the problem.
An alarm appears immediately when automatic address setting is started from the remote controller.Check the "Alarm Displays" table and correct the problem.
Nothing happens when the operator attempts to start automatic address setting from the remote controller.Check that the remote controller wiring and the inter-unit control wiring are connected correctly. Check that the indoor unit power is ON.
An alarm appears on the remote controller sometime from several seconds to several minutes after automatic address setting is started.Check the "Alarm Displays" table and correct the problem.
LED 1 and 2 on the outdoor unit control PCB indicate that automatic address setting is in progress (the LEDs blink alternately) for several minutes after automatic address setting is started (the compressors may also start and stop several times), however LED 1 and 2 never indicate that automatic address setting is completed (turn OFF)Check the alarm details on the "Outdoor Unit Control PCB LED 1 and 2 Alarms" table, then check the "Alarm Displays" table and correct the problem.
Led1 - Led 2 Display Meaning
Led1 – Led 2 Display Meaning

 

Led 1 - Led 2 Alarm Contents
Led 1 – Led 2 Alarm Contents

 

L02-L03-L04-L05-L06-L07-L08-L10-L17-L18-P01-P09-P10-P12-P14-P02-P03-P04-P05-P16-P22-P26-H31-P29-F01-F03-F10
L02 to L18-P01 to P14

 




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