YASKAWA Z1000 - Page 238

HOA Keypad Display Fault Name
Drive fails to operate properly due to noise
interference
• Review the possible solutions provided for handling noise interference.
• Review the section on handling noise interference on page 262 and check the control circuit lines,
main circuit lines, and ground wiring.
Overexcitation gain is set too high
• Check if the fault occurs simultaneously with overexcitation function operation.
• Consider motor flux saturation and reduce the value of n3-13 (Overexcitation Deceleration Gain).
Run command was applied while motor was
coasting
Set b3-01 to 1 to enable Speed Search at Start.
The rated output current of the drive is too small Use a larger drive.
HOA Keypad Display Fault Name
oFA00
Option Card Connection Error at Option Port CN5
Option compatibility error
Cause Possible Solution
The option card installed into port CN5 is
incompatible with the drive
Check if the drive supports the option card to be installed. Contact Yaskawa for assistance.
HOA Keypad Display Fault Name
oH
Heatsink Overheat
The heatsink temperature exceeded the overheat pre-alarm level set to L8-02. The default value for
L8-02 is determined by drive capacity (o2-04).
Cause Possible Solution
Surrounding temperature is too high
• Check the temperature surrounding the drive. Verify temperature is within drive specifications.
• Improve the air circulation within the enclosure panel.
• Install a fan or air conditioner to cool the surrounding area.
• Remove anything near the drive that might be producing excessive heat.
Load is too heavy
• Measure the output current.
• Decrease the load.
• Lower the carrier frequency (C6-02).
External cooling fan is stopped
• Replace the cooling fan. Refer to Cooling Fan Replacement: 2A0011 to 2A0059, 4A0005 to
4A0040, and 4A0052 oo B on page 277.
• After replacing the cooling fan, set parameter o4-03 to 0 to reset the cooling fan maintenance.
HOA Keypad Display Fault Name
oH1
Overheat 1 (Heatsink Overheat)
The heatsink temperature exceeded the drive overheat level. Overheat level is determined by drive
capacity (o2-04).
Cause Possible Solution
Surrounding temperature is too high
• Check the temperature surrounding the drive.
• Improve the air circulation within the enclosure panel.
• Install a fan or air conditioner to cool the surrounding area.
• Remove anything near the drive that might be producing excessive heat.
Load is too heavy
• Measure the output current.
• Lower the carrier frequency (C6-02).
• Reduce the load.
HOA Keypad Display Fault Name
oH3
Motor Overheat Alarm (PTC Input)
• The motor overheat signal to analog input terminals A1 or A2 exceeded the alarm detection level.
• Detection requires setting multi-function analog inputs H3-02 or H3-10 to E.
Cause Possible Solution
6.4 Fault Detection
238
YASKAWA ELECTRIC SIEP YAIZ1B 01E YASKAWA AC Drive – Z1000 Bypass Technical Manual