YASKAWA iQpump1000 User Manual page 281

HOA Keypad Display
Parameters related to Speed Search are set
incorrectly
Output current fluctuation due to input
phase loss
HOA Keypad Display
oL3
Cause
Parameter settings are not appropriate for
the load
Fault on the machine side (e.g., machine is
locked up)
HOA Keypad Display
oL4
Cause
Parameter settings are not appropriate for
the load
HOA Keypad Display
ov
Cause
Surge voltage present in the drive input
power.
The motor is short-circuited.
Ground current has overcharged the main
circuit capacitors via the drive input power.
Noise interference causes the drive to
operate incorrectly.
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 1 (alarm).
HOA Keypad Display
R-DNE-So
Cause
Terminal So (H1-0o = 95) has been
closed for the time set in P4-26, Remote
Drive Disable On-Delay, when P4-25,
Remote Drive Disable Selection, was set to
0 (N.O.).
YASKAWA TOEP YAIP1W 01F YASKAWA AC Drive - iQpump1000 User Manual
• Check the settings for all Speed Search related parameters.
• Adjust the current used during Speed Search (b3-03) and the Speed Search deceleration time (b3-02).
• After Auto-Tuning, set b3-24 to 1 to enable Speed Estimation Speed Search.
Check the power supply for phase loss.
Overtorque Detection 1
The current has exceeded the value set for torque detection (L6-02) for longer than the allowable time (L6-03).
Check L6-02 and L6-03 settings.
Check the status of the load. Remove the cause of the fault.
Overtorque Detection 2
The current has exceeded the value set for Overtorque Detection 2 (L6-05) for longer than the allowable
time (L6-06).
Check the settings of parameters L6-05 and L6-06.
DC Bus Overvoltage
The DC bus voltage exceeded the trip point.
• For 200 V class drives: approximately 410 V
• For 400 V class drives: approximately 820 V (740 V when E1-01 is less than 400)
• For 600 V class drives: approximately 1040 V
• Install a DC link choke or an AC reactor.
• Voltage surge can result from a thyristor convertor and a phase advancing capacitor operating on the same
drive input power system.
• Check the motor power cable, relay terminals and motor terminal box for short circuits.
• Correct grounding shorts and turn the power back on.
• Review possible solutions for handling noise interference.
• Review section on handling noise interference and check control circuit lines, main circuit lines and ground
wiring.
• If the magnetic contactor is identified as a source of noise, install a surge protector to the MC coil.
Set number of fault restarts (L5-01) to a value other than 0.
Pump Over Cycle
• Set the Pump Over Cycle alarm characteristics in P2-10 and P2-11.
• Drive response to this condition is controlled by P2-12, Over Cycling Mode.
Remote Drive Disable
Remove conditions causing the terminal to close.
Minor Fault Name
Minor Fault Name
Possible Solution
Minor Fault Name
Possible Solution
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solution
Minor Fault Name
Possible Solution
5.3 Alarm Detection
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