ABB ACH550-UH HVAC Installation, Operation & Maintenance Manual page 26

26
Fault
Code
22
23
23
24
25
26
27
28
29
30
31
32
33
34
ACH550-UH
Fault Name In
Panel
Ripple voltage in the DC link is too high. Check for and correct:
SUPPLY PHASE
• Missing mains phase.
• Blown fuse.
• Interaction with external input filter. Set parameter 2619 to "ON".
Not used (Available only with encoder and parameter Group 50).
ENCODER ERR
The drive is not detecting a valid encoder signal. Check for and correct:
ENCODER ERR
• Encoder presence and proper connection (reverse wired, loose
connection, or short circuit).
• Voltage logic levels are outside of the specified range.
• A working and properly connected Pulse Encoder Interface Module,
OTAC-01.
• Wrong value entered in parameter 5001
only be detected if the error is such that the calculated slip is greater
than 4 times the rated slip of the motor.
• Encoder is not being used, but parameter 5002
(
ENABLED
Motor speed is greater than 120% of the larger (in magnitude) of 2001
OVERSPEED
MINIMUM SPEED
• Parameter settings for 2001 and 2002.
• Adequacy of motor braking torque.
• Applicability of torque control.
• Brake chopper and resistor.
Not used as of the publication of this manual.
RESERVED
Internal fault. Configuration Block Drive ID is not valid. Contact your local
DRIVE ID
ABB sales representative.
Internal configuration file has an error. Contact your local ABB sales
CONFIG FILE
representative.
1 Fieldbus communication has timed out. Check for and correct:
SERIAL ERR
• Fault setup (3018
• Communication settings (Group 51 or 53 as appropriate).
• Poor connections and/or noise on line.
Error in reading the configuration file for the embedded fieldbus.
EFB CONFIG
FILE
Fault trip forced by the fieldbus. See the fieldbus User's Manual.
FORCE TRIP
1 Fault code reserved for the embedded fieldbus (EFB) protocol application.
EFB
These codes are not used as of the publication of this manual.
2
EFB
3
EFB
Fault in the motor circuit. One of the motor phases is lost. Check for and
MOTOR PHASE
correct:
• Motor fault.
• Motor cable fault.
• Thermal relay fault (if used).
• Internal fault.
ACH550 Installation, Operation and Maintenance Manual
Description and Recommended Corrective Action
).
or 2002
MAXIMUM SPEED
COMM FAULT FUNC
. A wrong value will
PULSE NR
ENCODER ENABLE
. Check for and correct:
and 3019
COMM FAULT TIME
= 1
).