Mitsubishi Electric MXZ-2F33VF4-E1 Service Manual page 174

MXZ-3F54VF3 MXZ-3F68VF3 MXZ-4F72VF3 MXZ-4F80VF3
MXZ-3F54VF4 MXZ-3F68VF4 MXZ-4F72VF4 MXZ-4F80VF4
MXZ-4F83VF MXZ-5F102VF MXZ-6F120VF2
MXZ-4F83VF2 MXZ-5F102VF2 MXZ-6F122VF
•The factory setting of low standby power mode for above units is "Deactivated".
In case that compressor is not in operation, and both LED1 (Red) and LED2 (Yellow) are not lit, 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 connector (SC751) are necessary on the
outdoor control P.C. board.
•It is recommended to activate the low standby power mode when none of the indoor units listed in Table 1 is connected.
NOTE:
•Units come with low standby power mode deactivated 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.
Table 1: List of the target models
Type Model name
Wall-mounted MSZ-AP**VF
MLZ-KP**VF
1way-cassette
4way-cassette SLZ-M**FA
PEAD-M**JA(L)
Ceiling-Concealed
SEZ-M**DA(L)
Ceiling-Suspended PCA-M**KA
Floor-Standing SFZ-M**VA
To activate low standby power mode:
Connect SC751 to CN750.
Set "2" on SW1 to ON.
To deactivate low standby power mode:
Connect SC751 to CN751.
Set "2" on SW1 to OFF.
SC751 SW1
ON
CN750
1 2 3 4 5 6
ON
CN751
1 2 3 4 5 6
OBH790L
SC751
MODE
Activated
Deactivated
CN751
SW871
SW1
ON
1 2 3 4 5 6
SW2
ON
1 2 3 4 5 6
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