ABB ACH550-UH-011A-6 User Manual page 377

Fault Fault name in
code the panel
2
DC OVERVOLT
3
DEV OVERTEMP
4
SHORT CIRC
5
RESERVED
6
DC UNDERVOLT
7 1
AI LOSS
372
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Description and
recommended corrective action
Intermediate circuit DC voltage is excessive.
Check for and correct:
• static or transient overvoltages in the input
power supply
• insufficient deceleration time (parameters
2203
DECELER TIME
2)
TIME
• undersized brake chopper (if present).
Drive heatsink is overheated. Temperature is
at or above limit.
R1...R4: 115 °C (239 °F)
R5/R6: 125 °C (257 °F).
Check for and correct:
• fan failure
• obstructions in the air flow
• dirt or dust coating on the heat sink
• excessive ambient temperature
• excessive motor load.
Fault current. Check for and correct:
• a short-circuit in the motor cable(s) or
motor
• supply disturbances.
Not used.
Intermediate circuit DC voltage is not
sufficient. Check for and correct:
• missing phase in the input power supply
• blown fuse
• undervoltage in mains.
Analogue input 1 loss. Analogue input value
is less than 1
AI FAULT LIMIT
and correct:
• source and connection for analogue input
• parameter settings for
(3021) and 3001
Diagnostics and maintenance
ACH550-01 User's Manual
1 and 2206
DECELER
(3021). Check for
1
AI FAULT LIMIT
<
AI MIN FUNCTION
.