8 Electrical checks of main parts
Inverter
SMGB0136 rev.0 - 07/2021
162
8.1.4 Inverter time chart
Main Circuit
Power Source
Frequency
Instruction
Output
Voltage
Soft Start-Stop
(Frequency)
Failure Signal
Activation of
Protection
Device
Overload
Signal
Charged
Indication
(LED5, RED)
Turn ON
10sec.
Activation of
Recovery
Transmitting
Error 30sec.
Activation of
Protection
Output
Frequency
HIGH
Frequency
LOW
All bit 1
All bit 1 Operation
The changing speed
depends on command from PCB.
Main circuit
power source
Frequency
instruction
Output voltage
Soft start-stop
(frequency)
Failure signal
Activation of
protection
device
Overload signal
Charged
indication
(LED5, RED)
Turn ON
Activation of
recovery
10 sec.
Transmitting
error 30 sec.
Activation of
protection
Output
The changing speed depends on
command from PCB
All bit 1 operation
All bit 1
Frequency LOW
Frequency
HIGH
8.1.5 Protective function
1 Excessive high or low voltage for inverter
a. Level of detection
• When the voltage of direct current is greater than (A)
• When the voltage of direct current is smaller than (B)
Power supply 3N ~ 400V 50Hz 1 ~ 230V 50Hz
(A) 750 Volts 376 (400*) Volts
(B) 350 Volts 194 Volts
(*) For RAS-3HVRNC2
b. Function
When abnormalities are detected the inverter compressor is stopped and transmit the signal code of stoppage
cause to PCB1.
c. Cancellation of protection function.
Transmission for signal code of stoppage cause is cancelled when a stopping order is given or main power source
is cut off.
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