Possible cause of malfunction

 

 

Alarm

 

 

message

Serial

Improper setting.

This alarm message shows when the indoor unit for multiple-use

L02

commu-nication

 

is not connected to the outdoor unit.

 

 

 

 

errors

 

Duplication of main indoor unit address setting in group control.

<L03>

Mis-setting

 

 

 

 

 

Duplication of outdoor R.C. address setting.

L04

 

 

 

 

 

 

 

 

 

There are 2 or more indoor units

Priority set remote controller

L05

 

 

controllers which have operation

 

 

 

 

Non-priority set remote controller

L06

 

 

mode priority in 1 refrigerant circuit.

 

 

Group control wiring is connected to individual control indoor unit.

L07

 

 

 

 

 

 

 

Indoor unit address is not set.

 

L08

 

 

 

 

 

 

 

Capacity code of indoor unit is not set.

<<L09>>

 

 

 

 

 

 

Capacity code of outdoor unit is not set.

L10

 

 

 

 

 

 

Mis-matched connection of outdoor units which have different kinds

L17

 

 

of refrigerant.

 

 

 

 

 

 

 

 

 

 

 

 

4-way valve operation failure

 

L18

 

 

 

 

Activation of

Protective device in indoor unit

Thermal protector in indoor unit fan motor is activated.

<<P01>>

protective

is activated.

 

 

 

Improper wiring connections of ceiling panel.

<<P09>>

device

 

 

 

 

 

 

Float switch is activated.

 

<<P10>>

 

 

 

 

 

 

 

 

 

Operation of protective function of fan inverter.

P12

 

 

 

 

 

 

O2 sensor (detects low oxygen level) activated.

P14

 

 

 

 

 

Protective device in outdoor unit

Compressor thermal protector is activated.

P02

 

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.

 

P03

 

 

 

 

 

 

 

High pressure switch is activated.

 

P04

 

 

 

 

 

 

Detective phase (3-phase outdoor unit only)

P05

 

 

 

 

 

 

Compressor running failure resulting from missing phase in the

P16

 

 

compressor wiring, etc. (Start failure not caused by IPM or no gas.)

 

 

 

 

 

 

 

 

 

 

Outdoor unit fan motor is unusual.

 

P22

 

 

 

 

 

 

Overcurrent at time of compressor runs more than 80Hz (DCCT

P26

 

 

secondary current or ACCT primary current is detected at a time

 

 

other than when IPM has tripped.)

 

 

 

 

 

 

 

 

 

IPM trip (IPM current or temperature)

H31

 

 

 

 

 

 

Inverter for compressor is unusual. (DC compressor does not

P29

 

 

operate.)

 

 

 

 

 

Thermistor

Indoor thermistor is either open

Indoor coil temp. sensor (E1)

 

<<F01>>

fault

or damaged.

 

 

 

Indoor coil temp. sensor (E2)

 

<<F02>>

 

 

 

 

 

 

 

 

 

 

Indoor coil temp. sensor (E3)

 

<<F03>>

 

 

 

 

 

 

Indoor suction air (room) temp. sensor (TA)

<<F10>>

 

 

 

 

 

 

Indoor discharge air temp. sensor (BL)

<<F11>>

 

 

 

 

 

 

Outdoor thermistor is either

Compressor discharge sensor (TD)

 

F04

 

open or damaged.

 

 

 

 

Outdoor No. 1 coil liquid temp. sensor (C1)

F07

 

 

 

 

 

 

 

 

 

Outdoor air temp. sensor (TO)

 

F08

 

 

 

 

 

 

Compressor suction port temperature sensor (TS)

F12

 

 

 

 

 

 

 

High pressure sensor

 

F16

 

 

 

 

 

EEPROM on indoor unit PCB failure

 

 

F29

 

 

 

 

 

Protective

Protective device for compressor

EEPROM on the outdoor unit PCB is a failure.

F31

device for

No. 1 is activated.

 

 

 

compressor is

 

Current is not detected when comp. is ON.

H03

activated

 

 

 

 

 

 

 

 

 

 

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Sanyo 85464359981002 installation instructions Alarm

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