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Troubleshooting Guide 
10
• D_pipe TH. is short or open 
• D_pipe TH. is not connected to the outdoor pcb assembly
• Damage or defect on the sensing circuit of outdoor pcb assembly
D-Pipe TH. is short or
open
D_PIPE TH. is connected to
Outdoor pcb assembly ?
D_PIPE TH. is right ?
YES
No
Connect to CN-D_PIPE 
in outdoor pcb assembly
Sensing circuit of outdoor
pcb is right ?
No
Check D_PIPE TH.
-  Measure resistance of TH.
   (about 200kΩ at 25°C.)
YES
No
-  Check soldering state of
  R07H, R08H, C04H
Check flow
Description Cause of error
Error code