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Hitachi RAS-(4-6)HVRNS2E - DSW5: Transmission Setting of End Terminal Resistance; DSW6: Power Source Setting; Individual Operation; DSW1 (PCB2): Cancellation of Electrical Current Detection. Only for RAS-(8-12)HRNM; Jumper Lead Setting (JP1-6)

Hitachi RAS-(4-6)HVRNS2E
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4 Electrical Wiring
87
SMGB0064 rev.0 - 08/2011
4
DSW5: Transmission setting of end terminal resistance
Before shipment, No. 1 pin of DSW5 is set at ON.
In case of having 2 or more outdoor units connected to the same H-link, set for the second unit the pin number 1 of
DSW5 at OFF.
If only one outdoor unit is used, no setting is required.
Function Setting position
Setting before shipment
Cancellation
DSW6: Power source setting / individual operation
Function 3 HP (4/5/6) HP (8/10/12) HP
230V
(Setting before shipment)
400V
(setting before shipment)
380-415V
(setting before shipment)
In case of multiple operation, must activated to OFF position pin No. 1
DSW1 (PCB2): Cancellation of electrical current detection. Only for RAS-(8-12)HRNM
Function Setting position
Setting before shipment
Cancellation of electrical current detection (only for PCB2 test)
Jumper lead setting (JP1~6)
Setting before shipment:
JP1 JP2 JP3 JP4 JP5 JP6
1 0 0 1 1 1
N O T E
0: Open
1: Short circuit
The function selection using the jumper lead setting is shown in the table below.
Setting Function Details
JP1
(Only for RAS-(8-12)HRNM)
Cooling -15 ºC & Heating.
When JP1 is set to “open”, temperature range for cooling mode is xed until -15
ºC. Not available for individual indoor control.
JP2 Not used
JP3 Not used
JP4 Fixing for Cooling Only
When JP4 is set to “open”, operation mode is xed for cooling. Thermo-ON is
available only by “COOL” or “DRY” mode at indoor unit.
JP5 Alternative Defrosting Mode
When JP5 is set to “open”, alternative defrosting mode is available. When one
of the outdoor units connected by H-LINK II is under defrosting, the other outdo-
or units defrosting is cancelled. After one outdoor unit defrosting is completed,
another outdoor unit starts defrosting operation.
JP6 R407C pipes
When JP6 is set to “open”, existing piping system control is available. High
pressure control is performed depending on existing piping strength.

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