8-5. Troubleshooting in Test Operation

If the phenomena appear, such as a check code is output or the remote controller is not accepted in power-ON after cabling work or in address setup operation, the following causes are considered.

8-5-1. A check Code is Displayed on the Remote Controller

Check code

Outdoor unit

 

 

 

 

 

 

 

 

 

 

displayed on

7-segment

Cause

 

 

 

 

 

 

 

Countermeasures

remote controller

display

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E04

E19-00

Outdoor power is formerly turned on.

 

 

 

 

 

 

 

Turn on the power again.

 

 

 

 

 

 

 

 

 

 

 

(In order of Indoor Outdoor)

 

 

 

 

 

 

 

 

 

 

 

 

 

There is none of outdoor terminator resistor, or there

Check SW30 bit 2 of the outdoor unit.

 

 

are two or more resistances.

 

 

 

 

 

 

 

No connection between multiple refrigerant lines:

 

 

(After address setup)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SW30 bit 20N

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Connection between multiple refrigerant lines:

 

 

 

 

 

 

 

 

 

 

 

SW30 bit 2 of the connected outdoor unit is turned

 

 

 

 

 

 

 

 

 

 

 

on only in one line.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ON

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

After address was decided, all the

 

1

 

 

 

 

Check and modifies disconnection of indoor/outdoor

 

 

indoor units do not correctly response

 

 

 

 

 

 

 

 

communication line.(Communication line between

 

 

 

 

 

 

 

 

 

 

 

 

after power-ON in outdoor unit.

 

 

 

 

 

 

 

 

outdoor unit and the leading indoor unit)

 

 

 

 

 

 

 

 

 

 

 

Check influence of communication noise.

 

 

 

 

SW30

 

 

 

 

 

 

 

 

 

 

 

 

 

L08

Address setup error

 

 

 

 

 

 

 

Set up address again.

 

 

• Only line addresses of the connected indoor units

 

 

 

are undefined.

 

 

 

 

 

 

 

 

 

 

• The outdoor line address and the line addresses in

 

 

 

all indoor units do not match.

 

 

 

 

 

 

 

 

 

 

• The indoor addresses are duplicated.

 

 

 

 

 

 

 

 

 

 

(Units except those displaying E04 are duplicated.)

 

 

 

• A header unit is not set up in a group.

 

 

 

 

 

 

 

 

 

 

(Except group displaying E04)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E08-XX

Duplication of indoor addresses.

 

 

 

 

 

 

 

Set up address again.

 

 

(Address No in which sub-code of the check code

 

 

 

are duplicated)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E07

There is none of outdoor terminal

 

 

 

 

 

 

 

 

Check SW30 bit 2 of the outdoor unit.

 

 

 

 

 

 

 

 

 

 

 

resistance, or there are two or more

 

ON

2

 

 

 

No connection between multiple refrigerant lines:

 

 

 

1

 

 

 

 

 

 

resistances.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SW30 bit 20N

 

 

(After address setup, when terminal

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Connection between multiple refrigerant lines:

 

 

resistance setup is changed after

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SW30 bit 2 of the connected outdoor unit is turned

 

 

 

 

 

 

 

 

 

 

 

 

 

power-ON.)

SW30

on only in one line.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Transmission circuit error at interface side

 

 

 

 

 

 

 

Replace the interface P.C. board.

 

 

(P.C. board failure)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E06

After address setup, communication from all the

Check and correct disconnection of indoor/outdoor

 

 

indoor units interrupted under condition that a

 

 

 

 

communication line.(Communication line between

 

 

normal operation can be performed.

 

 

 

 

 

 

 

outdoor unit and the leading indoor unit)

 

 

 

 

 

 

 

 

 

 

 

Check influence of communication noise.

 

 

 

 

 

 

 

 

 

 

 

E16

E16-XX

Exceeded No of connected indoor units or

 

 

 

 

 

 

 

Adjust No of connected indoor units or capacity.

 

 

exceeded capacity.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E25

E25

Duplication of outdoor addresses.

 

 

 

 

 

 

 

Do not use a manual setup for outdoor address.

 

 

(Only when outdoor address was manually set up)

 

 

 

 

 

 

 

 

 

 

 

 

L04

L04

Duplication of outdoor line addresses

 

 

 

 

 

 

 

Modify line address setup of the outdoor unit

 

 

• Line address setup error, occurred after connec-

between lines. (Set up SW 13 and 14 on the

 

 

interface P.C. board.)

 

 

tion between U1, U2 and U3, U4 connectors

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L05 ()

L06

Duplicated of indoor units with priority

 

 

 

 

 

 

 

The Heat Recovery Multi is not set up on priority.

 

 

 

 

 

 

 

 

 

 

 

 

L06 ()

 

There are two or more indoor units set up with

 

 

 

 

 

 

 

priority.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L08

L08

Address setup error

 

 

 

 

 

 

 

Set up address again.

 

 

• Only indoor addresses of all the connected indoor

 

 

 

units are undefined.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

() [L05]: Displayed on the indoor unit set up with priority

[L06]: Displayed on the indoor unit except one set up with priority

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Toshiba MMU-AP0091H Troubleshooting in Test Operation, Check Code is Displayed on the Remote Controller, Check code