Hitachi RAS-(3-6)HVRNM2E Service Manual page 179

6 Optional functions
• Fixing of demand function
This function regulates the running current of the outdoor unit. If the demanded current is above the set current, the
indoor unit capacity is reduced. The running current can be regulated both from internal signal. The capacity regulation
is 50%, 75%, 100%.This function can be activated when the demand is selected at one of input terminal indications
i1i2, and i3In case that multiple demand functions are set the input terminal indications, i1i2, and i3The de-
mand running current is selected with 5, 6, 7. PSW1.
• Wave function setting
This function regulates the power consumption of the outdoor unit. While this function is activated, the maximum limit
of running is changed as shown:
A. Electricity consumption at cooling (100%)
B. Electricty consumption at cooling (50, 75%)
This function can be activated when the demand is selected at one
of input terminal indications i1i2, and i3
The minimum limit of running current control is according to the set
value of the demand function.
If the demand function is not set at the input terminal indication,
this function can not be activated.
• Indoor temperature setting for energy saving
This function can be activated when the customer wants to reduce the system power consumption. The setting tem-
perature will be increased or decreased depends if it is in cooling or heating mode.
• Setting defrosting at low-speed
Using this option, you can select the speed of the indoor unit fan during the defrost period.
1 Standard situation: Indoor unit fan stoppage during defrosting.
2 Optional situation: Speed of the indoor unit fan at slow mode during the defrosting.
A: Discharge air temperature (°C)
B: Setting airflow
C: Low Slow Stoppage
D: Heating
E: Comp.stop by thermostat
F: Heating
G: Defrosting
H: Heating
• Low noise setting
This function can be activated and then the compressor frequency is set lower than the normal setting. This function
can activate in cooling or heating mode.
• Night-shift (low noise)
When you set the operation mode to night mode (low noise), which is used especially during the nighttime, the cooling
capacity is decreased to 60%. You should use the night shift operation only when the remaining cooling capacity can
supply the requested temperature.
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SMGB0064 rev.0 - 08/2011
Fan speed during defrosting
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