Mitsubishi Electric MXZ-3F54VF2 Para El Instalador página 12

4-3. REMOVING THE MAINTENANCE PANEL
The setting of Dip Switch on the outdoor controller board can be changed
without removing the front panel.
Follow the procedures below to remove the maintenance panel and set
the Dip Switch.
1) Remove screw(s) which fix the maintenance panel.
2) Remove the maintenance panel, and perform necessary settings.
3) Install the maintenance panel.
Note:
Make sure to fix the maintenance panel securely. Incomplete installation
could cause malfunction.
4-4. LOCKING THE OPERATION MODE OF THE AIR CONDITIONER (COOL, DRY, HEAT)
• Description of the function:
With this function, once the operation mode is locked to either COOL/DRY mode
or HEAT mode, the air conditioner operates in that mode only.
* Changing the setting is required to activate this function. Please explain about
this function to your customers and ask them whether they want to use it.
[How to lock the operation mode]
1) Be sure to turn off the main power for the air conditioner before making the
setting.
2) Set the "3" of SW1 on the outdoor controller board to ON to enable this function.
3) To lock the operation mode in COOL/DRY mode, set the "4" of SW1 on the
outdoor controller board to OFF. To lock the operation in HEAT mode, set the
same switch to ON.
4) Turn on the main power for the air conditioner.
4-5. HOW TO SET LOW STANDBY POWER MODE
In case that compressor is not in operation, and both LED1 (Red) and LED2
(Yellow) are not lighted, check the setting of low standby power mode on the
outdoor control P.C. board.
And check the settings for dip switch (SW1) and jumper connector (SC751).
• Before turning on the breaker, settings for dip switch (SW1) and jumper con-
nector (SC751) are necessary on the outdoor control P.C. board.
• When connecting one or more indoor units listed in Table 1, change the setting
to "deactivated low standby power mode".
Note:
• Units come with low standby power mode activated as factory setting.
• When connecting one or more indoor units listed in Table 1, the outdoor unit
does not work at "activated low standby power mode".
• In the event that SC751 is missing, outdoor unit will not work.
• Activate the P.C. board setting by turning ON the breaker.
To activate low standby power mode:
Connect SC751 to CN750.
Set the 2 of SW1 to ON.
To deactivate low standby power mode:
Connect SC751 to CN751.
Set the 2 of SW1 to OFF.
Table 1: List of the target models
Type
Wall-mounted
1way-cassette
4way-cassette
Ceiling-Concealed
Ceiling-Suspended
En-10
SC751 SW1
ON
CN750
1 2 3 4 5 6
ON
CN751
1 2 3 4 5 6
Model name Capacity
MSZ-AP**VF 15 / 20
MLZ-KP**VF 25 / 35 / 50
SLZ-M**FA 15 / 25 / 35 / 50
PEAD-M**JA(L) 50
SEZ-M**DA(L) 25 / 35 / 50 / 60
PCA-M**KA 50 / 60
Maintenance panel
LED
SW1
SW871
SW1
ON
SW2
1 2 3 4 5 6
COOL/DRY
CN750
CN751
MODE
Activated
Deactivated
SC751
SW1
ON
1 2 3 4 5 6
HEAT
SW871
SW1
ON
1 2 3 4 5 6
SW2
ON
1 2 3 4 5 6