YASKAWA iQpump1000 Quick Start Manual page 188

5.2 Fault Detection
There is loose wiring in the drive input
power terminals
There is excessive fluctuation in the drive
input power voltage
There is poor balance between voltage
phases
The main circuit capacitors are worn out
HOA Keypad Display
PoC
Cause
The pump has exceeded the number of
cycles set in P2-10 in the time set in P2-11
and P2-12 is set to 2 (fault).
HOA Keypad Display
rF
Cause
The proper braking resistor option has not
been installed
A regenerative converter, regenerative unit,
or braking unit is being used
HOA Keypad Display
rH
Cause
Deceleration time is too short and excessive
regenerative energy is flowing back into the
drive
The duty cycle is too high
Excessive braking inertia
The braking operation duty cycle is too
high
The proper braking resistor has not been
installed
Note: The magnitude of the braking load trips the braking resistor overheat alarm, NOT the surface temperature. Using the braking resistor more
frequently than its rating permits will trip the alarm even when the braking resistor surface is not very hot.
HOA Keypad Display
rr
Cause
The braking transistor is damaged
The control circuit is damaged
188
• Ensure the terminals are tightened properly.
• Apply the tightening torque as specified in this manual.
on page 87 for details.
• Check the voltage from the drive input power.
• Review the possible solutions for stabilizing the drive input power.
Stabilize drive input power or disable phase loss detection.
• Check the maintenance time for the capacitors (U4-05).
• Replace the capacitor if U4-05 is greater than 90%. For instructions on replacing the capacitor, contact
Yaskawa or a Yaskawa representative.
Check for problems with the drive input power. If drive input power appears normal but the alarm continues
to occur, replace either the control board or the entire drive. For instructions on replacing the control board,
contact Yaskawa or a Yaskawa representative.
Pump Over Cycle
• Set the Pump Over Cycle fault characteristics in P2-10 and P2-11.
• Drive response to this condition is controlled by P2-12, Over Cycling Mode.
• Auto-restart of this fault is controlled by L5-52, Pump Over Cycle Fault Retry Selection.
• Set the Pump Over Cycle automatic setpoint compensation in P2-12, Over Cycling Mode, P2-13, Setpoint
Compensation, and P2-14, Maximum Setpoint Compensation.
Braking Resistor Fault
The resistance of the braking resistor is too low.
Select a braking resistor option that it fits the drive braking transistor specification.
Set L8-55 to 0 to disable the braking transistor protection selection.
Braking Resistor Overheat
Braking resistor protection was triggered.
Fault detection is enabled when L8-01 = 1 (disabled as a default).
• Check the load, deceleration time, and speed.
• Reduce the load inertia.
• Increase the deceleration times (C1-01 to C1-04).
• Replace the dynamic braking option with a larger device that can handle the power that is discharged.
Check the duty cycle. Maximum of 3% duty cycle is available when L8-01 = 1.
Recalculate braking load and braking power. Reduce the braking load by adjusting braking resistor settings.
Check the braking operation duty cycle. Braking resistor protection for ERF-type braking resistors
(L8-01 = 1) allows a braking duty cycle of maximum 3%.
• Check the specifications and conditions for the braking resistor device.
• Select the optimal braking resistor.
Dynamic Braking Transistor
The built-in dynamic braking transistor failed.
• Cycle power to the drive and check for reoccurrence of the fault.
• Replace either the control board or the entire drive. For instructions on replacing the control board, contact
Yaskawa or a Yaskawa representative.
YASKAWA TOEP YAIP1W 01A YASKAWA AC Drive - iQpump1000 Quick Start Guide
Refer to Wire Gauges and Tightening Torque
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution