DFS05-19
DFS05-19
Multi-Split Communication Wiring Check
The FlexFit Multi and Arctic multi systems are capable of performing a self-test to check
communication wiring between the outdoor to the indoor units. This is a crucial step when performing
start-up on a system as well as performing checks during a service call. It allows you to confirm that
the wiring matches with the associated refrigerant lines for a given circuit.
Arctic Multi
2U20EH2VHA
3U24EH2VHA
FlexFit Multi 3U24MS2VHB
4U36MS2VHB
1
Models 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 dip
switches are located on the Service Monitor
Board. (pictured right).
3. Turn ON power to the outdoor unit.
JUNE 2019
Service Bulletin
SW1
