Fuji Electric FRENIC-HVAC User Manual page 46

Item
Overcurrent protection Protects the inverter from overcurrent caused by overload and stops the inverter.
Protects the inverter from overcurrent caused by a short-circuit in the output circuit and
Short-circuit protection
stops the inverter.
Protects the inverter from overcurrent caused by a ground fault in the output circuit and
stops the inverter. (For 230 V class series inverters of 25 HP or below, 460 V ones of 50 HP
or below and 575 V ones of 50 HP or below)
Ground fault protection
Detects the zero-phase current in the output power, protects the inverter from overcurrent
caused by a ground fault in the output circuit, and stops the inverter. (For 230 V class series
inverters of 30 HP or above, 460 V ones of 60 HP or above and 575 V ones of 60 HP or
above)
Detects an excessive DC link bus voltage (400 VDC for 230 V class series, 800 VDC for
460 V class series, 1000 VDC for 575 V class series) and stops the inverter.
Overvoltage protection
If a strikingly excessive input voltage is applied by mistake, the protection cannot be
guaranteed.
Detects a DC link bus voltage drop (200 VDC for 230 V class series, 400 VDC for 460 V
Undervoltage
class series, 600 VDC for 575 V class series) and stops the inverter.
protection
Note that no alarm will be issued if "Restart after momentary power failure" is selected.
• Detects an input phase loss and protects or stops the inverter.
Input phase loss
• When the load is small, a phase loss may not be detected.
Output phase loss Detects a break in inverter output wiring during running and stops the inverter output.
Detects the inverter heat sink temperature in the case of a cooling fan failure or overload
and stops the inverter.
Detects an internal agitating fan failure and stops the inverter.
(For 230 V class series inverters of 7.5 to 25 HP:
For those of 30 HP or above: All inverter types)
(For 460 V class series inverters of 15 to 50 HP:
Overheat protection
For those of 60 HP or above: All inverter types)
• Detects the inner temperature of the inverter unit in the case of a cooling fan failure or
overload and stops the inverter.
• Stop the inverter output detecting the cooling fan failure.
• Detects a charging circuit error and stops the inverter.
Stops the inverter output upon detection of the abnormal heat sink temperature and
Overload protection
switching element temperature calculated with the output current.
External alarm input The digital input signal THR stops the inverter with an alarm.
Detects a break of the main circuit fuse in the inverter and stops the inverter.
Fuse blown
(For 230 V class series inverters of 125 HP, 460 V ones of 150 HP or above, 575 V ones of
200 HP or above)
Detects a charger circuit error and stops the inverter. (For 230 V class series inverters of 30
Charger circuit error
HP or above, 460 V ones of 60 HP or above,575 V ones of 60 HP or above )
• Failure of the air circulation DC fan inside the inverter.
For inverters of :
230V series of 75HP or above (UL open type ), 30HP or above (NEMA/UL Type 1)and
7.5HP or above (NEMA/UL Type 12)
DC fan locked
460V series of 150HP or above (UL open type ), 60HP or above (NEMA/UL Type 1) and
15HP or above (NEMA/UL Type 12)
575V series of 200HP or above (UL open type ) 60HP or above (NEMA/UL Type 1) and
15HP or above (NEMA/UL Type 12)
Stops the inverter with the electronic thermal overload protection setting to protect the
Electronic thermal
motor.
overload
Protects general-purpose motors and inverter motors over all frequency range. (It is
protection
possible to set the running level and thermal time constant (0.5 to 75.0 min).)
Detects the motor temperature to stop the inverter for protecting the motor.
PTC thermistor
Connect a PTC thermistor between terminals [C1] and [11] and configure the switch on the
control printed circuit board and function codes.
Overload early
The inverter outputs a warning signal at the predetermined level before stop.
warning
The inverter checks memory data when the power is turned ON or data is written. If any
Memory error
memory error is detected, the inverter stops.
The error detection function stops the inverter output upon detection of a communications
Keypad
error between the keypad and the inverter control circuit during operation using the
communications error
keypad.
If the inverter detects a CPU error or LSI error caused by noise or some other factors, this
CPU error
function stops the inverter output.
Explanation
UL TYPE 12 rated ones only,
NEMA/
UL TYPE 12 rated ones only,
NEMA/
2-13
2.2 Common Specifications
Remarks
OC1
OC2
OC3
EF
OV1
OV2
OV3
LV
Lin
OPL
OH1
FAL
OH3
OLU
OH2
FUS
PbF
FAL
OL1
OH4
-
Er1
Er2
Er3