Haier FlexFit Multi 3U24MS2VHB User Manual

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

Haier FlexFit Multi 3U24MS2VHB Specifications

General

Brand	Haier
Model	FlexFit Multi 3U24MS2VHB
Category	Air Conditioner
Language	English

Summary

Multi-Split Communication Wiring Check

Wiring Check Setup Instructions

Instructions to prepare the unit for the communication wiring check, including dip switch settings.

Communication Wiring Test Procedure

Steps and expected system responses during the communication wiring self-test, including display codes.