YASKAWA Z1000U Technical Manual page 207

HOA Keypad Display
Cause
• The capacity of the power supply is too small.
• The distortion in the power supply is too large.
A phase loss occurred in the input power supply. Check the input power supply for phase loss or an imbalance in the interphase voltages.
HOA Keypad Display
EF0
Cause
An external fault was received from the PLC and
F6-03 is set to a value other than 3
Problem with the PLC program
HOA Keypad Display
EF1
EF2
EF3
EF4
EF5
EF6
EF7
EF8
Cause
An external device tripped an alarm function
Multi-function contact input setting is incorrect
HOA Keypad Display
Err
Cause
Noise has corrupted data while writing to the
EEPROM
Hardware problem
HOA Keypad Display
FAn
Cause
YASKAWA SIEP YAIZ1D 01C Z1000U HVAC MATRIX Drive Bypass Technical Manual
• Increase the capacity of the power supply.
• Lower the impedance of the input power supply wiring.
Option Card External Fault
An external fault condition is present.
• Remove the cause of the external fault.
• Remove the external fault input from the PLC.
Check the PLC program and correct problems.
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.
External Fault (input terminal S8)
External fault at multi-function input terminal S8.
• Properly connect the signal lines to the terminals assigned for external fault detection
(H1-oo = 24).
• Reconnect the signal line.
• Check for unused terminals set for H1-oo = 24 (External Fault).
• Change the terminal settings.
EEPROM Write Error
Data cannot be written to the EEPROM
• Press "ENTER" on the HOA keypad.
• Correct the parameter setting.
• Cycle power to the drive.
• If the problem continues, replace the control board or the entire drive. Contact Yaskawa or a
Yaskawa representative for instructions on replacing the control board.
If the problem continues, replace the control board or the entire drive. Contact Yaskawa or a Yaskawa
representative for instructions on replacing the control board.
Internal Fan Fault
Fan or magnetic contactor failure
6.4 Fault Detection
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
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