Troubleshooting
Si33-105
192
Troubleshooting R407C PLUS Series Heat Recovery System
3.36
Malfunction of System, Refrigerant System Address
Undefined
Remote
Controller
Display
UH
Supposed
Causes
!
Improper connection of transmission wiring between outdoor unit and outdoor unit outside
control adaptor
!
Defect of indoor unit PC board
!
Defect of outdoor unit PC board (A1P)
Troubleshooting
(VF062)
NO
YES
YES
After fixing incorrect wiring,
push and hold the RESET
button on the outdoor unit PC
board for 5 seconds.
Normal
NO
Is electricity
being introduce for
the first time after installation
or after an indoor or outdoor
unit PC board has
been replaced?
Is
indoor - outdoor and
outdoor - outdoor unit
transmission wiring
normal?
YES
Normal
NO
Does a malfunction occur?
NO
Does
a "UH" malfunction occur for
all indoor units in
the system?
YES
NO
Does
a malfunction
occur even after 12
minutes elapses from the time
when electricity is introduced
to indoor and outdoor
units?
YES
Replace indoor unit PC board.
Replace outdoor unit PC
board (A1P).
After fixing incorrect wiring, push
and hold the RESET button on
the outdoor unit PC board for 5
seconds Replace whichever is
defective.
H
The unit will not run for up
to 12 minutes.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Summary of Contents for R407C PLUS
Page 1: ...System R407C PLUS Series Heat Recovery System Si33 105 Service Manual ...
Page 11: ...Introduction Si33 105 x ...
Page 41: ...Specifications Si33 105 30 Specifications R407C PLUS Series Heat Recovery System ...
Page 147: ...Test Operation Si33 105 136 Test Operation R407C PLUS Series Heat Recovery System ...
Page 263: ...Si33 105 iv Index ...