Yaskawa G5HHP Drive User Manual
Page 262
Advanced Operation
7.5.6 Protective Functions: L
7 - 98
Inverter Overheating (OH) Pre-alarm Settings: L8-02, L8-03
User
Change
during
Setting
Factory
Valid Access Levels
User
Constant
Number
Name
g
during
Opera-
tion
Setting
Range
Unit Factory
Setting
V/f
Control
V/f with
PG
Open
Loop
Vector
Flux
Vector
L8-02
Overheat pre-alarm
level
x
50 to 110
°C
95
A
A
A
A
L8-03
Operation selection
after overheat pre-
alarm
x
0 to 3
--
3
A
A
A
A
D
Constant L8-02 specifies the detection temperature in °C for the Inverter overheat (OH) pre-alarm func-
tion. An overheat pre-alarm occurs when the temperature of the cooling fins reaches this level.
D
Constant L8-03 specifies the processing that will be performed when an overheat pre-alarm occurs.
Apart from this setting, cooling fin overheating (OH1) is detected as a protection function at 105_C.
D
Settings
Setting
Function
0
Decelerates to a stop in the deceleration time set in C1-09. (Protection operation: Fault contacts
operate)
1
Coast to stop. (Protection operation: Fault contacts operate)
2
Emergency stop in the emergency-stop time set in C1-09. (Protection operation: Fault contacts
operate)
3
Continues operation. (Alarm: Monitor display only.)
Input Open-phase Protection Selection: L8-05
User
Change
during
Setting
Factory
Valid Access Levels
User
Constant
Number
Name
g
during
Opera-
tion
Setting
Range
Unit Factory
Setting
V/f
Control
V/f with
PG
Open
Loop
Vector
Flux
Vector
L8-05
Input open-phase
protection selection
x
0, 1
--
0
A
A
A
A
D
This function detects changes in the main circuit DC voltage which indicate a power supply open-phase,
large imbalance in the power supply voltage, or deterioration of the main circuit capacitor.
D
Settings
Setting
Function
0
Disabled.
1
Enabled. (Detects input power supply open-phase, 3-phase imbalance, or deterioration of the
main circuit capacitor.)
Output Open-phase Protection Selection: L8-07
D
This function detects an Inverter output open-phase.
User
Change
during
Setting
Factory
Valid Access Levels
User
Constant
Number
Name
g
during
Opera-
tion
Setting
Range
Unit Factory
Setting
V/f
Control
V/f with
PG
Open
Loop
Vector
Flux
Vector
L8-07
Output open-phase
protection selection
x
0, 1
--
0
A
A
A
A
D
Settings
Setting
Function
0
Disabled.
1
Enabled. (Detects an output open-phase at under 10% of the Inverter’s rated output current.)
D
False open-phase detections may occur or detection may not work when the motor capacity is small
compared to the Inverter capacity. In this case, disable the detection function by setting L8-07 to 0.
7