Haier 2U18MS2VHB Installation Manual page 15

INSTALLATION INSTRUCTIONS
Step 3 - Installation of the Outdoor Unit (Cont.)
LED 1 2
ALL Flashing
Status
ON Flashing
ON Flashing
Only one LED flashing
Model 4U36MS2VHB
Connection priority is
largest indoor unit on
lowest terminal set (D),
and install remaining
indoor units from
bottom to top.
When there are 2
indoors, the prior
service valves are
When there are 3
indoors, the prior
service valves are
When there are 4
indoors, the prior
service valves are
NOTE: For better oil return and more reliable system, please execute as the above when connecting indoor unit.
NOTE: No connection priority on 4U36EH2VHA.
Model Number Factory
Charge
Unit oz
2U20EH2VH* 99
2U18MS2VH* 49.5
3U24EH2VH* 99
3U24MS2VH* 67
4U36MS2VH* 113
4U36EH2VH* 113
31-5000001 Rev. 6
3 4 5
OFF
ALL ON
Flashing ON Flashing
Flashing ON ON
Connections Cautions
3U24EH2VHA
D C C B
D C B C B A
D C B A /
Refrigerant Charge and Pipe Length Information
Total Pipe Additional
Length of charge rule*
factory charge
ft oz/ft
100 0.2
50 0.2
100 0.2
75 0.2
100 0.2
131 0.2
Message
Unit not connected
Automatic checking impossible, all units connected wrong
All units connected correctly
ON: unit connected correctly
Flashing: unit connected wrong, need to change the wiring manually
between 2, 3, and 5
ON: unit connected correctly
Flashing: unit connected wrong, need to change the wiring manually
between 2 and 3
3U24MS2VHB 2U18MS2VHB
A
B
C
C B
C B A
/
Branch System
Maximum Maximum
pipe length pipe length
ft ft
82 164
65 98
82 197
82 197
82 230
82 230
2U20EH2VHA
A
B
B A B A
/ /
/ /
Minimum pipe length
ft
6 ft per indoor and 20 ft per system
6 ft per indoor and 20 ft per system
6 ft per indoor and 20 ft per system
6 ft per indoor and 20 ft per system
6 ft per indoor and 25 ft per system
6 ft per indoor and 25 ft per system
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