Main Parts; Inverter - Hitachi mini-HNRQ1 Series Service Manual

MAINTENANCE

2. Main Parts

2.1 Inverter

(1) 3~6.5HP
● Specification
Applicable Model
Applicable Power Source
Output Voltage (Maximum)
Output Current
(Maximum)
Control Method
Range Output
Frequency
Output Characteristics
Speed Rate
Protection Function
(Excessive High or Low
Voltage for Inverter)
Overcurrent Protection for Inverter
(Electronic Thermal/
Instantaneous Overcurrent)
Protection of IPM of Inverter PCB
Overload Control
Fin Temperature Increase
Inverter PCB
Fan Controller
Inverter
Fan
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
Demagnetization Current ×90%
Demagnetization Current ×85%
(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.
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 is cancelled when Current Value ≤ Rated Current x 98%
The unit is stopped when the fin temperature is higher than 95°C.
3HP~4.5HP
220-240V/1Ph/50Hz
220V
16A
1.2A
Vector PWM Control
10Hz~120Hz
90rpm~850rpm ±10rpm
250
200
150
100
50
0
0 20 40
Frequency (Hz)
0.125Hz/s, 0.25Hz/s, 0.5Hz/s, 1Hz/s, 3Hz/s (5 Steps)
140
5HP~6.5HP
20A
±1Hz
60 80 100 120 140