Preprogrammed Faults; Operation Limits; Power Limit; Automatic Resets - Daikin ACS320 Operation Manual

Stall Protection
The drive protects the motor in a stall situation . It is possible to
adjust the supervision limits (frequency, time) and choose how
the drive reacts to the motor stall condition (alarm indication /
fault indication & drive stop / no reaction) .
Settings
Parameters 3010...3012, page 53
Earth Fault Protection
The Earth Fault Protection detects earth faults in the motor or
motor cable . The protection is active only during start .
An earth fault in the input power line does not activate the
protection .
Settings
Parameter 3017 EARTH FAULT,
Incorrect Wiring
Defines the operation when incorrect input power cable
connection is detected .
Settings
Parameter 3023 WIRING FAULT,

Preprogrammed faults

Overcurrent
The overcurrent trip limit for the drive is 325% of the drive
nominal current .
DC Overvoltage
The DC overvoltage trip limit is 420 V (for 200 V drives) and
840 V (for 400 V drives) .
DC Undervoltage
The DC undervoltage trip limit is adaptive . See parameter 2006
UNDERVOLT CTRL, page 48 .
Drive Temperature
The drive supervises the IGBT temperature . There are two
supervision limits: Alarm limit and fault trip limit .
Short Circuit
If a short circuit occurs, the drive will not start and a fault
indication is given .
Internal Fault
If the drive detects an internal fault, the drive is stopped and a
fault indication is given .
Supply Phase Loss
If the drive detects supply phase loss (excessive DC voltage
ripple), the drive is stopped and a fault indication is given .
OM 1190-1 • MD4 VFD
page 53
page 53

Operation Limits

The drive has adjustable limits for output frequency, current
(maximum) and DC voltage .
Settings
Parameter Group 20: Limits,

Power Limit

Power limitation is used to protect the input bridge and the
DC intermediate circuit . If the maximum allowed power is
exceeded, the drive torque is automatically limited . Maximum
overload and continuous power limits depend on the drive
hardware. For specific values, see chapter Technical data on
page 102 .

Automatic Resets

The drive can automatically reset itself after overcurrent,
overvoltage, undervoltage, external and "analog input below a
minimum" faults . The Automatic Resets must be activated by
the user .
Table 14: Automatic Resets Settings
Parameter
Group 31: Automatic Reset
Table 15: Automatic Resets Diagnostics
Alarm
AUTORESET
28
p f
rogram eaTures
page 48
Additional Information
Automatic reset settings
Additional Information
Automatic reset alarm
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