Troubleshooting (OP: Schedule Timer) Si33-105
210 Troubleshooting R407C PLUS Series Heat Recovery System
7.2 PC Board Defect
Remote
Controller
Display
M1
Supposed
Causes
!
Defect of schedule timer PC board
Troubleshooting
Reset power supply.
Does the
system return to
normal?
YES
External factor other than
equipment malfunction
(noise etc.)
Replace the indoor unit PC
board.
(V0843)
NO
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
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