Hitachi RAS-3-HVNC - Page 274

8. Troubleshooting
260
SMGB0079 rev.0 - 01/2013
If you are using a wireless remote control switch with the built-in receiver part of the wall-type indoor unit and you need to
perform the above checking, perform the following procedure:
1 Turn OFF the power supply.
2 Disconnect the connector (CN25) on PWB(M).
3 Connect the PC-ART.
4 Turn ON the power supply.
After nishing the checking, turn OFF the power supply again and reconnect the connectors according to the previous
situation before the checking.
Result
Repeat
From previous page
Press
If there is a next unit
After 7 seconds
After 1 to 5 seconds
Press
(ex.) Indication of unit No. “
1”
Press
After 1 second
Release PCB check
mode
N O T E
• Ifthisindicationcontinuesandthealarmcode“J1”isnotdisplayed,thismeansthateachoneofindoorunit
isnotconnectedtotheremotecontrolswitch.Checkthewiringbetweentheremotecontrolswitchandthe
indoorunit.
• Inthistroubleshootingprocedure,checkingofthefollowingpartsofthePCBisnotavailable.
 PCBinindoorunit: relaycircuit,DIPswitch,optioncircuit,fancircuit,protectioncircuit.
 PCBinoutdoorunit:relaycircuit,DIPswitch,optioncircuit.
• Ifthistroubleshootingisperformedinthesystemusingthecentralstation,theindicationofthecentralstation
maychangeduringthisprocedure.However,thisisnotabnormal.
• Afterthistroubleshooting,thememoryoftheabnormaloperationoccurrencecounter,whichwasdescribed
before,willbedeleted.