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Check code Check code name Cause<br />
Check code Check code name<br />
Cause<br />
[E06] / [04]<br />
(AI-NET)<br />
Decreased number of indoor units [E04] / [04] Indoor/Outdoor communication<br />
1. Communication lines (U1, U2) connection error<br />
between indoor and outdoor<br />
2. Communication connector's connection error on<br />
indoor unit, error on P.C. board<br />
3. Communication connector's connection error on<br />
outdoor unit, error on I/F board<br />
4. Power supply of indoor unit (Is power turned on?)<br />
(AI-NET)<br />
circuit error<br />
(Detected at indoor side)<br />
1. Power of outdoor unit was firstly turned on.<br />
2. Connection error of communication line between<br />
indoor and outdoor<br />
3. End terminal resistance setup error on<br />
communication between indoor and outdoor<br />
4. Address setup error<br />
Sub-code: No. of indoor units which received signals normally<br />
Is there no<br />
miswiring/disconnection<br />
on communication line<br />
between indoor and<br />
outdoor?<br />
No<br />
Is connection<br />
of CN40 connector on<br />
indoor P.C. board<br />
normal?<br />
Yes<br />
No<br />
Correct communication line.<br />
Correct wiring or connector.<br />
Was power turned on<br />
in order of indoor unit<br />
➝ outdoor unit?<br />
Yes<br />
Is connection<br />
(U1/U2 terminals) of<br />
indoor/outdoor inter-unit<br />
wire normal?<br />
Yes<br />
No<br />
No<br />
Turn on power again in order<br />
of indoor unit ➝ outdoor unit.<br />
Correct inter-unit wire.<br />
Yes<br />
Is connection of CN01<br />
connector on outdoor I/F<br />
P.C. board normal?<br />
No<br />
Is connector<br />
connection from U1/U2<br />
terminals of indoor/outdoor<br />
inter-unit wire<br />
normal?<br />
Yes<br />
No<br />
Correct connector connection.<br />
Yes<br />
Is the end terminal<br />
resistance setup of outdoor<br />
unit normal?<br />
No<br />
Correct the end terminal<br />
resistance setup.<br />
Is power of indoor unit<br />
turned on?<br />
No<br />
Turn on power of indoor unit.<br />
Yes<br />
Yes<br />
No<br />
Is address setup correct?<br />
Set up address again.<br />
Did a power failure<br />
occur?<br />
No<br />
Is there no noise, etc?<br />
Yes<br />
Yes<br />
Clear the check code.<br />
Check noise, etc, and eliminate<br />
it if any.<br />
Yes<br />
Is power applied to fuse<br />
(F03) on indoor P.C.<br />
board?<br />
Yes<br />
No<br />
Check connection of inter-unit<br />
wire between indoor and outdoor<br />
is correct, and then connect<br />
communication line connector on<br />
indoor P.C. board (CN40) to<br />
CN44 (EMG).<br />
No<br />
Is there no noise, etc?<br />
Yes<br />
Check noise, etc, and<br />
eliminate it if any.<br />
Check indoor P.C. board.<br />
Defect ➝ Replace<br />
(NOTE)<br />
1. When signal is not sent for a certain period from the indoor unit which has<br />
used to send signals normally, [E06] is displayed.<br />
No<br />
Check indoor P.C. board.<br />
Defect ➝ Replace<br />
For details, refer to “7-5. Troubleshooting in Test Operation”.<br />
195
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