Hitachi RAS-8.0HNBRMQ1 - Main Parts; Inverter

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MAINTENANCE
2. Main Parts
2.1 Inverter
(1) 3~6.5HP
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Specication
Applicable Model 3HP~4.5HP 5HP~6.5HP
Applicable Power Source 220-240V/1Ph/50Hz
Output Voltage (Maximum) 220V
Output Current
(Maximum)
Inverter PCB 16A 20A
Fan Controller 1.2A
Control Method Vector PWM Control
Range Output
Frequency
Inverter 10Hz~120Hz ±1Hz
Fan 90rpm~850rpm ±10rpm
Output Characteristics
Speed Rate 0.125Hz/s, 0.25Hz/s, 0.5Hz/s, 1Hz/s, 3Hz/s (5 Steps)
Protection Function
(Excessive High or Low
Voltage for Inverter)
Voltage output is stopped, when voltage is lower than 190V DC or higher than 450V DC.
Cause of Abnormality: Failure of Inverter PCB, Incorrect Wiring
Overcurrent Protection for Inverter
(Electronic Thermal/
Instantaneous Overcurrent)
(1) Short-Circuit Trip of Arm. (Protect by internal IPM)
(2) Instantaneous Overcurrent Trip. It is detected when current value is Over
Demagnetization current × 90%.
(3) Instantaneous Overcurrent Trip: It is detected when current value is Over
Demagnetization current × 85%.
(4) Electronic Thermal Trip: It is detected when current value is over rate current. Condition
is maintained longer than 10 seconds.
Protection of IPM of Inverter PCB
The transistor module has three protection functions for self-protection.
(1) Some of the output terminals "U", "V", or "W" are short-circuited.
(2) Running current of IPM of Inverter PCB reaches the maximum rated current.
(3) Control voltage of IPM of Inverter PCB abnormally decreases.
Overload Control Overload control is cancelled when Current Value ≤ Rated Current x 98%
Fin Temperature Increase The unit is stopped when the n temperature is higher than 95°C.
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Output Voltage(V)
Frequency (Hz)
Demagnetization Current ×85%
Demagnetization Current ×90%