Service Functions - Mitsubishi Electric MCFH-GA35VB Service Manual

8

SERVICE FUNCTIONS

MCFH-GA35VB - MCFH-GA50VB -
E1
8-1. TIMER SHORT MODE
For service, set time can be shortened by short circuit of JPG and JPS on the electronic control P.C. board.
The time will be shortened as follows. (Refer to 9-6.)
3-minutes time delay : 3-minutes
Set time : 1 minute 1-second
Set time : 3 minute 3-second (It takes 3 minutes for the compressor to start operation. However, the starting time is
8-2. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION
A maximum of 4 indoor units with wireless remote controllers can be used in a room. In this case, to operate each
indoor unit individually by each remote controller, P.C. boards of remote controller must be modified according to the
number of the indoor unit.
How to modify the remote controller P.C. board
Remove batteries before modification. The board has a print as shown below;
Remote controller model : KM04M
The P.C. board has the print "J1" and "J2". Solder "J1" and "J2" according to the number of indoor unit as shown in
Table 1. After modification, press the RESET button.
Table1.
1 unit operation
No. 1 unit No modification
No. 2 unit
No. 3 unit
No. 4 unit
How to set the remote controller exclusively for particular indoor unit
After you turn the breaker ON, the first remote controller that sends the signal to the indoor unit will be regarded as the
remote controller for the indoor unit.
The indoor unit will only accepts the signal from the remote controller that has been assigned to the indoor unit once they
are set.
The setting will be cancelled if the breaker has turned off, or the power supply has shut down.
Please conduct the above setting once again after the power has restored.
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MCFH-GA60VB -
E1
3-seconds
shortened by short circuit of JPG and JPS.)
J1 J2
2 units operation
Same as at left
– Solder J1
– –
– –
9
E1
NOTE : For remodelling, take out the batteries and
press the OPERATE/STOP(ON/OFF) button
twice or 3 times at first.
After finish remodelling, put back the
batteries then press the RESET button.
3 units operation
Same as at left
Same as at left
Solder J2
– Solder both J1 and J2
4 units operation
Same as at left
Same as at left
Same as at left