to download LG Multi V Plus - Hawco
to download LG Multi V Plus - Hawco
to download LG Multi V Plus - Hawco
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Error<br />
No.<br />
Error Type Error Point Main Reasons<br />
Copyright ©2007 <strong>LG</strong> Electronics. Inc. All right reserved.<br />
Only for training and service purposes<br />
- 87 -<br />
Troubleshooting Guide<br />
05 Indoor & Outdoor unit<br />
transmission error<br />
No signal transmission<br />
between indoor & outdoor<br />
units.<br />
1. Au<strong>to</strong> addressing is not done<br />
2. transmission cable is not connected<br />
3. Short circuit of transmission cable<br />
4. Indoor unit transmission circuit fault<br />
5. Outdoor unit transmission circuit fault<br />
6. Not enough distance between power and transmission<br />
cable?<br />
■ Error diagnosis and countermeasure flow chart<br />
Does all the IDUs show<br />
same error code CH05?<br />
Yes<br />
Is outdoor PCB LED<br />
blinking?<br />
Yes<br />
Check if the<br />
transmission cable is<br />
properly connected<br />
<strong>to</strong> indoor / outdoor<br />
terminal block?*<br />
Yes<br />
No<br />
Check the main power<br />
supply at the ODU<br />
terminal block?<br />
Yes<br />
Is main circuit breaker off?<br />
Yes<br />
* (Note1) Transmission from IDU is normal if voltage<br />
fluctuation(-9V ~ +9V) exists when checking DC voltage<br />
of communication terminal between IDU and ODU<br />
No<br />
No<br />
Is <strong>to</strong>tal number of indoor<br />
units connected displayed<br />
after au<strong>to</strong> addressing?<br />
END<br />
Improper connection of power supply cable<br />
Main power supply problem<br />
Re connect transmission cable<br />
Outdoor PCB fault<br />
Replace after checking<br />
Indoor PCB fault<br />
Replace after checking<br />
No<br />
No<br />
No<br />
Replace the PCB of indoor unit<br />
displayed error<br />
Re-connect after check the<br />
transmission cable of indoor<br />
unit displayed error**<br />
Replace outdoor PCB after<br />
checking<br />
Replace TRANS after checking<br />
Check the insulation of inverter<br />
/ constant compressor and replace<br />
if required<br />
Check the capacity of main circuit<br />
breaker and replace if required<br />
If all ok,<br />
Turn on main circuit breaker<br />
* If the DC voltage between transmission terminal A, B<br />
of indoor unit is fluctuate within (-9V~+9V) then<br />
transmission from outdoor unit is normal<br />
<strong>LG</strong>E Internal Use Only
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