Hitachi RAS-(4-12)HNP(1)(E) - Wave Function Setting (UE); Cold Draft Protection 1 (Fb); Cancellation of Hot Gas Bypass Control (3-12 HP Premium) (E1); Forced Stoppage after Defrost Operation (“D5”)

6 Optional functions
180
SMGB0087 rev.0 - 12/2013
Wave function setting (UE)
Press “PSW1” and select the setting condition “1”, so that the wave function setting “UE”.
While this function is activated, the maximum limit of running current is changed from (*)60% to 100% as shown in the
gure.
Electricity
consumption
(100%)
Electricity
consumption
(60 to 80%)
 N O T E
• (*)40%forRAS-(4-6)H(V)NC1E
• Wavefunctioncanbeactivatedwhendemandfunctionisselectedatoneoftheinputterminalindicationsi1,i2and
i3.
• Theminimumlimitofrunningcurrentcontrolisaccordingtothesetvalueofthedemandfunction.
• Ifdemandfunctionisnotsetattheinputterminalindication,thisfunctioncannotbeactivated.
Cold draft protection 1 (Fb)
Press PSW1 and select the setting condition “1” at the cold draft protection 1 “Fb”, so the cold draft protection can be set.
When the minimum indoor unit discharge air temperature falls down to 12ºC and below at cooling operation, outdoor fan
stops and compressor frequency forcibly decreases to prevent a drop in discharge air temperature.
Settingcondition Temperature(ºC)
Condition
0 - Not available (default setting)
1 < 12
The cold draft is prevented by the compressor frequency control and turning ON
SVC (solenoid valve for high pressure bypass circuit).
2 < 12 The cold draft is prevented by the compressor frequency control.
Cancellation of hot gas bypass control (3-12 HP premium) (E1)
Press “PSW1” and select the setting condition “1” at the cancellation of hot gas bypass control, so the hot gas bypass
control can be cancelled.
Forced Stoppage after Defrost Operation (“d5”)
Press “PSW1” and select the setting condition “1” in Cold Draft Protection “d5”. By setting this function, the outdoor unit
stops operation after defrost operation is nished. Then following 3-Minute Guard (Enforced Stoppage) , the heating start-
up control operation starts.