30
Electric wiring and the application
Identification:
•
Master unit: by setting dip switch, the unit number is 0. It is used to communicate with indoor
unit, also it is the organizer of outdoor communications as communication master unit.
•
Slave unit: by setting dip switch, the unit number is not 0.
• Dip switch definition:
BM1 is usually set by the personnel on site; BM2, BM3, BM4 are pre-set in the factory.
BM1_1: Master outdoor unit searches the total outdoor units after power ON at first time. The
quantity of total outdoor units is floating from right to left on LED. "1=0" is one outdoor unit,
"2=01" is two outdoor units, "3=012" is three outdoor units.
BM1_2: Master outdoor unit searches the total indoor units after power ON at first time. The
quantity of total indoor units is floating from right to left on LED. "-04-" is 4 indoor units, "-06-"
is 6 indoor units, "-15-" is 15 indoor units.
BM1_3: The setting is 0 or 1.Default is 0. Once power off,unit software shall reset to "OFF"
automatically ignoring BM1_3 setting.
BM1 introduction
BM1_1 Outdoor searching
After startup
0
Begin to search outdoor
1
Stop searching outdoor and lock the quantity
BM1_2 Indoor searching
After startup
0
Begin to search indoor and VP device
1
Stop searching indoor and VP device and lock the
quantity
BM1_3
Start up after
preheating for 6
hours
0
Allow(must be electrified for 6
hours or oil temperature should
reach the standard starting
value)
Group class
(physical master
unit is valid)
1
Forbidden(it can start up when
the oil temperature reaches the
reduced allowable starting valve)
BM1_4
Heating when
outdoor temperature
over 25degree
0
Allow
Group class
(physical master
unit is valid)
1
Forbidden
BM1_5 Over match setting
0
Allow
Group class
(physical master
unit is valid)
1
Forbidden
BM1-6 Pre-set
0
Pre-set (default)
Group class
(physical master
unit is valid)
1
Pre-set
BM1_7
BM1_8 Address setting
BM1_7
BM1_8
Unit number
0
0
0# (physical master unit)
0
1
1#
1
0
2#
1
1
3#
