6.5 Faults
480 YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference
Code Name Causes Possible Solutions
FB02 Wait For Interlock Timeout
The digital input set to Run Interlock is open. • Install a NC BAS Interlock Circuit/Damper Interlock between
DI-x and IG-24 on PCB A2.
• Install a jumper between DI-2 and IG-24 on PCB A2. Use this
method when you will add a a safety circuit in the future or if
you will not use a safety circuit.
• Make sure that the input assigned for the Interlock is active in the
timeout period set in Z1-15.
Note:
Do a Fault Reset to clear the fault.
Code Name Causes Possible Solutions
FB03 External Fault Bypass (EFB)
An digital input set for external fault (EFB) was
activated.
Remove the cause of the external fault.
An external fault (EFB) was received from the serial
communications network.
• Remove the cause of the external fault.
• Remove the external fault input from the controller.
• Make sure that the controller program is correct.
Note:
Do a Fault Reset to clear the fault.
Code Name Causes Possible Solutions
FB05 Motor Overload
The load is too heavy.
Decrease the load.
The cycle times for acceleration and deceleration are
too short.
Increase the acceleration and deceleration times in C1-01 and C1-
02.
You are driving a general-purpose motor below the
rated speed with a high load.
• Decrease the load
• Increase the speed
• If the motor is designed to operate at low speeds, increase the
motor capacity or use a motor designed to operate in the desired
speed range.
The motor current in E2-01 is incorrect. • Check the motor rated current.
• Enter the motor rated current as shown on the motor nameplate
to E2-01.
The maximum output frequency in E1-03 is incorrect.
Check the E1-03 setting and correct it.
You are operating more than one motor from one
bypass.
Set L1-01 = 0 to disable motor protection and install a thermal relay
to each motor.
The electrical thermal protection characteristics and
the motor overload characteristics do not align.
• Make sure that the motor characteristics are correct for the
application.
• Set L1-01 to the correct type of motor protection.
• Install an external thermal relay.
The electrical thermal relay is operating at an
incorrect level.
• Check the current rating as shown on the motor nameplate.
• Check the E2-01 value.
Note:
Do a Fault Reset to clear the fault.
Code Name Causes Possible Solutions
FB06 External Overload 1
The load is too heavy.
Decrease the load.
The cycle times for acceleration and deceleration are
too short.
Increase the acceleration and deceleration times in C1-01 and C1-
02.
You are driving a general-purpose motor below the
rated speed with a high load.
• Decrease the load
• Increase the speed
• If the motor is designed to operate at low speeds, increase the
motor capacity or use a motor designed to operate in the desired
speed range.
Note:
A Fault Reset is not necessary to clear the fault.
Code Name Causes Possible Solutions
FB07 External Overload 2
The load is too heavy.
Decrease the load.
The cycle times for acceleration and deceleration are
too short.
Increase the acceleration and deceleration times in C1-01 and C1-
02.
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