Outdoor Pcb Dip Switch Setting - Haier MRV5-H Service Manual

6.3 Outdoor PCB Dip Switch Setting

LED light definition:
• LED1: power supply lamp
Power on light
• LED3: electronic expansion valve LEVa1, LEVa2, fault lamp
No fault, not light
• LED4: electronic expansion valve LEVb, LEVc, fault lamp
No fault, not light
• LED5: communication lamp between outdoors
Communication is normal, flashing
• LED6: communication lamp between indoor and outdoor
Communication is normal, flashing
• LED7: communication lamp between PCB and power module
Communication is normal, flashing
Outdoor dip switch configuration:
Identification:
• Master Unit: Master unit is identified by setting dip switch BM1-7, 8 to zero.
• Function master unit: the outdoor unit, whose priority is set as 0, operates with the highest priority.
• Physical slave unit: by setting dip switch, the unit number is not 0.
• Functional slave unit: the outdoor without the highest priority of running, the priority clas is 1~3.
• Group class setting: physical master unit setting is valid, which can be used for all the units. For example,
silence, snow-proof, piping length etc setting. Set all kinds of state on the physical master unit as a representative.
• Single clas setting: only be used for the single unit, instead of the whole group. For example, sensor backup
running, inverter board selection etc.
• In the following table, 1 is ON, 0 is OFF.
Dip switch introduction:
• BM1 is usually set by the engineer 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 digital tube SMG1 and SMG2. "1=0" is one outdoor unit, "2=01" is
two outdoor units, "3=012" is three outdoor units, "4=0123" is four outdoor units.
• BM1_2: Master outdoor unit searches the total indoor units after locked the quantity of the outdoor units. The
quantity of total indoor units is floating from right to left on digital tube SMG1 and SMG2. "-04-" is 4 indoor units,
"-06-" is 6 indoor units, "-15-" is 15 indoor units.
• BM1_3: The setting is OFF or ON. Default is ON. Once power off, unit software shall reset to "OFF"
automatically ignoring BM1_3 setting.
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