Haier Arctic Multi Series Service Bulletin

Also see for Arctic Multi 2U20EH2VHA:

DFS05-19DFS05-19Multi-Split Communication Wiring CheckThe FlexFit Multi and Arctic multi systems are capable of performing a self-test to checkcommunication wiring between the outdoor to the indoor units. This is a crucial step when performingstart-up on a system as well as performing checks during a service call. It allows you to confirm thatthe wiring matches with the associated refrigerant lines for a given circuit.Arctic Multi 2U20EH2VHA3U24EH2VHAFlexFit Multi 3U24MS2VHB4U36MS2VHB1Models affected:Instructions:1. Disconnect power to the outdoor unit.2. Set Dip Switches SW1-1, SW1-2, SW1-3 &SW1-4 to the ON position. These dipswitches are located on the Service MonitorBoard. (pictured right).3. Turn ON power to the outdoor unit.JUNE 2019Service BulletinSW1

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