YASKAWA A1000

6.4 Fault Detection
344 YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
Digital Operator Display Fault Name
oFC02
Option Card Fault at Option Port CN5-C
Same t
ype of option card already connected
Cause Possible Solution
An option card of the same type is already installed in
option port CN5-A or CN5-B.
Except for PG options, each option card type can only be installed once. Make sure only one type of option card is connected.
An input option card is already installed in option port
CN5-A or CN5-B.
Make sure that a comm. option, a digital input option, or an analog input option is installed. The same type of card cannot be
installed twice.
Three PG option boards are installed. Maximum two PG option boards can be used at the same time. Remove the PG option board installed into option port CN5-A.
Digital Operator Display Fault Name
to
oFC03 to oFC11
Option Card Error Occurred at Option Port CN5-C
to
oFC12 to oFC17
Cause Possible Solution
Option card or hardware is damaged.
• Cycle power to the drive.
• If the problem continues, replace either the control board or the entire drive. For instructions on replacing the control board,
contact YASKAWA or your nearest sales representative.
Digital Operator Display Fault Name
to
oFC50 to oFC55
Option card error occurred at option port CN5-C
Cause Possible Solution
Option card or hardware is damaged. Refer to the option manual for details.
Digital Operator Display Fault Name
oH
Heatsink Overheat
Th
e temperature of the heatsink exceeded the overheat pre-alarm level set to L8-02. 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. Verif
y 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).
Internal cooling fan is stopped.
• Replace the cooling fan. Refer to Cooling Fan Component Names on page 384.
• After replacing the drive, reset the cooling fan maintenance parameter (o4-03 = 0).
Digital Operator Display Fault Name
oH1
Overheat 1 (Heatsink Overheat)
The
temperature of the heatsink exceeded the drive overheat level. The 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.
Digital Operator Display Fault Name
oH3
Motor Overheat Alarm (PTC Input)
• The motor overheat signal to analog input terminal
A1, A2, or A3 exceeded the alarm detection level.
• Detection requires multi-function analog input H3-02,
H3-10, or H3-06 be set to “E”.
Cause Possible Solution
Motor has overheated
• Check the size of the load, the accel/decel times, and the cycle times.
• Decrease the load.
• Increase the acceleration and decelerati
on times (C1-01 through C1-08).
• Adjust the preset V/f pattern (E1-04 through E1-10). Th
is will mainly involve reducing E1-08 and E1-10.
• Be careful not to lower E1-08 and E1
-10 too much, as this reduces load tolerance at low speeds.
• Check the motor rated current.
• Enter the motor rated current as indi
cated on the motor nameplate (E2-01).
• Ensure the motor cooling system is operating normally.
• Repair or replace the motor cooling system.
Digital Operator Display Fault Name
oH4
Motor Overheat Fault (PTC Input)
• The motor overheat signal to analog input terminal A1
, A2, or A3 exceeded the fault detection level.
• Detection requires that multi-function analo
g input H3-02, H3-10, or H3-06 = “E”.
Cause Possible Solution
Motor has overheated.
• Check the size of the load, the accel/decel times, and the cycle times.
• Decrease the load.
• Increase the acceleration and decelerati
on times (C1-01 through C1-08).
• Adjust the preset V/f pattern (E1-04 through E1-10). This will main
ly involve reducing E1-08 and E1-10. Be careful not to
lower E1-08 and E1-10 too much because this reduces load tolerance at low speeds.
• Check the motor rated current.
• Enter the motor rated current as indi
cated on the motor nameplate (E2-01).
• Ensure the motor cooling system is operating normally.
• Repair or replace the motor cooling system.