External Input Problems (Including Operation Mode) - Mitsubishi Electric PUHY-P250YNW-A Service Handbook

[8-3 External Input Problems (including operation mode) ]

8-3

External Input Problems (including operation mode)

The unit cannot be started or
stopped with the external input.
controller circuit board of the indoor unit:
Replace the controller circuit board.
8
- chapter 8
DipSW 1-10 on the
Other than OFF
NO
Normal/Local switching
SW on the indoor unit:
"Local" is selected.
NO
External signal is
set to other than pulse.
NO
An error occurred on
the indoor unit.
NO
Disconnected wire
or contact failure
NO
Possible to start and stop CN51
(between 1 and 2) on the controller
circuit board with CN51 short-circuited
NO
Make the DipSW settings as specified.
YES
Select "Normal".
YES
Input the signal with pulse signal or
with level signal with the DipSW 1-9 OFF.
YES
Go to the page that describes the occurred error.
YES
Repair the external wiring.
YES
Replace the external I/O circuit board or
the wiring between the controller circuit
board and the external I/O circuit board.
BS_08_C