YASKAWA Z1000 User Manual page 222

5.5 Alarm Detection
HOA Keypad Display
EF1
EF2
EF3
EF4
EF5
EF6
EF7
Cause
An external device has tripped an alarm function Remove the cause of the external fault and reset the multi-function input value.
Wiring is incorrect
Multi-function contact inputs are set incorrectly
HOA Keypad Display
FbH
Cause
Parameter settings for b5-36 and b5-37 are
incorrect
PI feedback wiring is faulty
Feedback sensor has malfunctioned
Feedback input circuit is damaged
HOA Keypad Display
FbL
Cause
Parameter settings for b5-13 and b5-14 are
incorrect
PI feedback wiring is faulty
Feedback sensor has malfunctioned
Feedback input circuit is damaged
HOA Keypad Display
HCA
Cause
Load is too heavy
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External Fault (Input Terminal S1)
External fault at multi-function input terminal S1.
External fault (input terminal S2)
External fault at multi-function input terminal S2.
External fault (input terminal S3)
External fault at multi-function input terminal S3.
External fault (input terminal S4)
External fault at multi-function input terminal S4.
External fault (input terminal S5)
External fault at multi-function input terminal S5.
External fault (input terminal S6)
External fault at multi-function input terminal S6.
External fault (input terminal S7)
External fault at multi-function input terminal S7.
• Ensure the signal lines have been connected properly to the terminals assigned for external fault
detection (H1-oo = 20 to 2F).
• Reconnect the signal line.
• Check if the unused terminals have been set for H1-oo = 20 to 2F (External Fault).
• Change the terminal settings.
Excessive PI Feedback
The PI feedback input is higher than the level set to b5-36 for longer than the time set to b5-37, and
b5-12 is set to 1 or 4.
Check parameters b5-36 and b5-37.
Correct the wiring.
Check the sensor and replace it if damaged.
Replace either the control board or the entire drive. For instructions on replacing the control board,
contact Yaskawa or your nearest sales representative.
PI Feedback Loss
The PI feedback input is lower than the level set to b5-13 for longer than the time set to b5-14, and
b5-12 is set to 1 or 4.
Check parameters b5-13 and b5-14.
Correct the wiring.
Check the sensor and replace it if damaged.
Replace either the control board or the entire drive. For instructions on replacing the control board,
contact Yaskawa or your nearest sales representative.
Current Alarm
Drive current exceeded overcurrent warning level (150% of the rated current).
Reduce the load for applications with repetitive operations (i.e., stops and starts), or replace the drive.
YASKAWA ELECTRIC TOEP C710616 45F YASKAWA AC Drive – Z1000 User Manual
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions