Hitachi Set Free mini-HNRQ1 Series, Service Manual

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EXTERNAL INPUT/OUTPUT AND FUNCTION SETTING
(4) Input Forced Stoppage (Control Function No.5)
When the input terminals for Forced Stoppage on the outdoor unit PCB are short-circuited while running,
the compressors and the indoor fan motors are stopped. The stoppage code No. “10” is given.
In this case, if the input terminals are opened, operation is resumed.
Notes:
When demand control (ON/OFF) is performed, it is recommended that the control (ON/OFF) time is set appropriately
according to the heat load. Also, set the demand control time approximately once in 15 minutes at the minimum in
consideration for saving energy.
*Thermo-ON: The outdoor unit and some indoor units are running.
Thermo-OFF: The outdoor unit and some indoor units stay on, but don’t run.
(5) Input Demand Current Control 40, 60, 70, 80, 100% (Control Function No.6 to 10)
When the input terminals for Demand Current Control on the outdoor unit PCB are short-circuited, the
compressor frequency is controlled so that the maximum limit of the outdoor running current is set to
100%, 80%, 70%, 60%, or 40% of the reference power consumption.
If the outdoor unit running current exceeds the maximum limit for twenty minutes, the indoor unit is put
under Thermo-OFF condition. In this case, the stoppage code No. “10” is given. When the input terminal
is opened during the demand current control, its control is released.
Notes:
Thermo-ON: The outdoor unit and some indoor units are running.
Thermo-OFF: The outdoor unit and some indoor units stay on, but don’t run
.