Danfoss Vacon NXP Applications Manual page 137

Fault codes
F91 Short Circuit
Drive has operated against current limit for more than short circuit time.
By phase fault detection has seen low voltage for more than short circuit time.
Warning comes immediately when current is at current limit, fault comes after the short circuit
time.
A1: Code given by V089 and older versions.
A2: Bi Phase
A3: Three Phase
Possible cause:
- There is a short circuit in the grid.
Correcting measures:
F92 D7 Voltage
Measured voltage is not within limits set in the protection group Grid Voltage D7
Possible cause:
- Voltage reference is below set limit.
- Supply Voltage is below set limit.
- There is a short circuit in the grid.
- OPT-D7 is installed but not connected.
•
Monitoring can be disabled with Control Options.
F93 D7 Frequency
Measured frequency is not within limits set in protection group Grid Frequency.
Possible cause:
- OPT-D7 is installed but measurements are not connected.
•
Monitoring can be disabled with Control Options.
- Grid frequency has gone outside the set limits.
24-hour support: +358 (0)201 212 575 • Email: vacon@vacon.com
vacon · 135
9