ACH550-UH User’s Manual 1-281
Diagnostics
5RESERVED Not used.
6
DC UNDERVOLT Intermediate circuit DC voltage is not sufficient. Check for and correct:
• Missing phase in the input power supply.
• Blown fuse.
• Undervoltage on mains.
7
AI1 LOSS Analog input 1 loss. Analog input value is less than AI1FLT LIMIT (3021).
Check for and correct:
• Source and connection for analog input.
• Parameter settings for AI1FLT LIMIT (3021) and 3001 AI<MIN FUNCTION.
8 AI2 LOSS Analog input 2 loss. Analog input value is less than AI2FLT LIMIT (3022).
Check for and correct:
• Source and connection for analog input.
• Parameter settings for AI2FLT LIMIT (3022) and 3001 AI<MIN FUNCTION.
9 MOT TEMP Motor is too hot, based on either the drive’s estimate or on temperature
feedback.
• Check for overloaded motor.
• Adjust the parameters used for the estimate (3005…3009).
• Check the temperature sensors and Group 35 parameters.
10
PANEL LOSS Panel communication is lost and either:
• Drive is in local control mode (the control panel displays HAND or OFF),
or
• Drive is in remote control mode (AUTO) and is parameterized to accept
start/stop, direction or reference from the control panel.
To correct check:
• Communication lines and connections
• Parameter 3002
PANEL COMM ERROR.
• Parameters in Group 10: START/STOP/DIR and Group 11:
REFERENCE SELECT (if drive operation is AUTO).
11
ID RUN FAIL The motor ID run was not completed successfully. Check for and correct:
• Motor connections
• Motor parameters 9905…9909
12
MOTOR STALL Motor or process stall. Motor is operating in the stall region. Check for and
correct:
• Excessive load.
• Insufficient motor power.
• Parameters 3010…3012.
14
EXTERNAL FLT 1 Digital input defined to report first external fault is active. See parameter
3003
EXTERNAL FAULT 1.
15
EXTERNAL FLT 2 Digital input defined to report second external fault is active. See parameter
3004
EXTERNAL FAULT 2.
Fault
Code
Fault Name In
Panel
Description and Recommended Corrective Action
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