User`s manual

6-60
6
 Inverter Overheat Protection
The Inverter is protected against overheating using a thermistor that detects the heatsink temperature.
When the overheat temperature level is reached the inverter output is switched off.
To prevent a suddenly and unexpected stop of the inverter due to an over temperature, an overheating pre-
alarm can be output. The temperature level for that pre-alarm can be set in parameter L8-02. Using parameter
L8-03 the inverter operation when an over temperature occurs can be selected.
If a multifunction output is programmed for this function the output is switched ON when the heatsink temper-
ature exceeds the overheat pre-alarm level set in L8-02.
Related Parameters
Multifunction Outputs (H2-01 to H2-03)
 Input Open Phase Protection
For the Input Phase Loss Detection the drive monitors the DC bus ripple. The drive integrates this ∆V value
over 10 scans (approximately 10 seconds). If the integrated ∆V value of any consecutive ten scan range is
greater than the voltage determined by multiplying L8-06 times the drives rated OV Trip point (400Vdc/
800Vdc), a PF fault will occur and the Drive will coast to stop
Fig 6.63 Input Phase Loss Detection
Related Parameters
Generally it is not recommended to disable this function.
Parameter
No.
Name
Factory
Setting
Change
during
Opera-
tion
Control Methods
V/f
V/f with
PG
Open
Loop
Vector
Closed
Loop
Vector
L8-02 Overheat pre-alarm level 95°C No AAAA
L8-03Inverter overheat (OH) pre-alarm operation selection 3 No AAAA
Set Value Function
Control Methods
V/f
V/f
with
PG
Open
Loop
Vector
Closed
Loop
Vector
20 Inverter overheat (OH) Yes Yes Yes Yes
Parameter
No.
Name
Factory
Setting
Change
during
Opera-
tion
Control Methods
V/f
V/f with
PG
Open
Loop
Vector
Closed
Loop
Vector
L8-05Input open-phase protection selection 1 No AAAA
t
L8-06
Phase Loss Fault
Signal
DC Bus
Voltage
10 seconds