Service manual

Troubleshooting

Diagnostic Procedure for Check Code

Check code Operation cause

1. No. of connected inverter outdoor units

[d1]

2. Incorrect setup of master outdoor unit

Master outdoor unit setup alarm

3. Defective outdoor interface P.C. board

Are there multiple inverter

outdoor units connected?

Is setup of the master

outdoor units

position duplicated?

[Set SW08 bit 2 on

interface P.C. board of

each unit.(*1)]

Set only one inverter

outdoor unit per system.

Set only one unit as master,

turn off all power source,

and then restart the operation.

Yes

Check interface P.C. board.

( *1) Setup of outdoor unit at center position (SW08 bit 2 setup on outdoor interface

P.C. board)

OFF: Slave/ON: Master (Automatic setup for inverter outdoor unit)