Yaskawa iQpump Micro User Manual
Page 187
Digital Operator Display
Minor Fault Name
When the feedback deviates from the
setpoint at a level greater than P1-15, for a
time set in P1-16. This is effective only
when P1-17 is set to 1 (alarm).
• Check for a blocked impeller, over cycling, or broken pipe.
• Set the Not Maintaining Setpoint alarm characteristics in P1-16 and P1-17.
• Drive response to this condition is controlled by P1-17, Not Maintaining Setpoint Selection.
Digital Operator Display
Minor Fault Name
oH
Heatsink Overheat
The temperature of the heatsink exceeded the overheat pre-alarm level set to L8-02.
Cause
Possible Solution
Surrounding temperature is too high
• Check the surrounding temperature.
• Improve the air circulation within the enclosure panel.
• Install a fan or air conditioner to cool surrounding area.
• Remove anything near drive that may cause extra heat.
Internal cooling fan has stopped.
• Replace the cooling fan.
• After replacing the drive, set parameter o4-03 to 0 to reset the cooling fan operation time.
Airflow around the drive is restricted.
• Provide proper installation space around the drive as indicated in the manual.
Orientation and Spacing on page 50
for details.
• Allow for the proper space and ensure that there is sufficient circulation around the control panel.
• Check for dust or other foreign materials clogging the cooling fan.
• Clear debris caught in the fan that restricts air circulation.
Digital Operator Display
Minor Fault Name
oH2
Drive Overheat Warning
“Drive Overheat Warning” was input to a multi-function input terminal, S1 through S7 (H1-oo= B).
Cause
Possible Solution
An external device triggered an overheat
warning in the drive.
Search for the device that tripped the overheat warning. Remove the cause of the problem.
Digital Operator Display
Minor Fault Name
oH3
Motor Overheat
The motor overheat signal entered to a multi-function analog input terminal exceeded the alarm level (H3-02
or H3-10 = E).
Cause
Possible Solutions
Motor thermostat wiring is faulty (PTC
input).
Repair the PTC input wiring.
There is a fault on the machine side (e.g.,
the machine is locked up).
• Check the status of the machine.
• Remove the cause of the fault.
Motor has overheated.
• Check the load size, accel/decel times, and cycle times.
• Decrease the load.
• Increase accel and decel times (C1-01 to C1-04).
• Adjust the preset V/f pattern (E1-04 through E1-10). This involves reducing E1-08 and E1-10.
Note:
Refrain from lowering E1-08 and E1-10 excessively to prevent a reduction in load tolerance
at low speeds.
• Check the motor-rated current.
• Enter motor-rated current on motor nameplate (E2-01).
• Ensure the motor cooling system is operating normally.
• Repair or replace the motor cooling system.
Digital Operator Display
Minor Fault Name
oL1
Motor Overload
The electronic motor overload protection tripped
Cause
Possible Solution
Load is too heavy
Reduce the load.
Cycle times are too short during
acceleration and deceleration
Increase the acceleration and deceleration times (C1-01 through C1-04).
5.3 Alarm Detection
YASKAWA TOEP YAIQPM 03B YASKAWA AC Drive - iQpump Micro User Manual
187
5
Troubleshooting