Remote Controller Diagnosis - Mitsubishi PUMY-71VM Technical & Service Manual

Display
Meaning and detecting method
7111 Remote controller sensor abnormality
In the case of network remote controller, it
is an abnormality when incapable
response returns from the net work remote
controller during the operation.
0403 Serial communication error
Abnormal if serial communication between
outdoor multi board and outdoor power
board is defective.

8-2. REMOTE CONTROLLER DIAGNOSIS

• MA remote controller is equipped with the diagnosis function.
Check the remote controller with this function when the unit does not operate with the remote controller.
(1)
Electric current marker
(2)
(3)
a)
b)
Causes
When an old type remote controller for
M-NET is used, and the remote
controller sensor is specified (SW1-1
is ON).
1 Breaking of wire or contact failure of
connector CN2
2 Breaking of wire or contact failure of
connector CN4
3 Defective communication circuit of
outdoor power board
4 Defective communication circuit of
outdoor multi board for power board
(1) First, check the electricity current maker.
If the correct voltage (DC 8.7~13V) is not supplied on the
remote controller, the electric current marker will be lit.
If the electricity current marker is not lit, check the remote
controller wiring and the indoor units.
(2) Transfer to remote control diagnosis mode.
Hold down the CHECK button for five seconds or more to
display the diagram on the left.
Press the FILTER button to commence diagnosis of remote
controller.
(3) Remote controller diagnosis results.
a) The remote control is functioning correctly.
Check other possible causes as there are on problems
with the remote controller.
b) The remote controller has a nonconformity.
The remote controller must be replaced.
Error display 1 ("NG") flashes to show a nonconformity
in the transmitter-receiver circuit.
81
Check points
Replace the remote controller to net
work remote controller.
12 Check connection of each
connector CN2, CN4.
3 Replace outdoor power board.
4 Replace outdoor multi board.
To be continued on the next page.