YASKAWA iQpump1000 User Manual page 262

5.2 Fault Detection
HOA Keypad Display
Internal cooling fan is stopped
HOA Keypad Display
oH1
Cause
Surrounding temperature is too high
Load is too heavy
HOA Keypad Display
oH4
Cause
Motor has overheated
HOA Keypad Display
oH5
<1>
Cause
Motor has overheated
<1> Detected in models 4A0930 and 4A1200.
HOA Keypad Display
oL1
Cause
Load is too heavy
Cycle times are too short during
acceleration and deceleration
A general-purpose motor is driven below
the rated speed with a high load
The output voltage is too high
The wrong motor rated current is set to
E2-01
The base frequency is set incorrectly
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• Replace the cooling fan. .
• After replacing the cooling fan, set parameter o4-03 to 0 to reset the cooling fan maintenance.
Overheat 1 (Heatsink Overheat)
The heatsink temperature exceeded the drive overheat level.
• 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.
• Measure the output current.
• Lower the carrier frequency (C6-02).
• Reduce the load.
Motor Overheat Fault (PTC Input)
• The motor overheat signal to analog input terminal A1, A2, or A3 exceeded the fault detection level.
• Detection requires setting multi-function analog inputs H3-02, H3-10, or H3-06 to E.
• Check the size of the load, the accel/decel times, and the cycle times.
• Decrease the load.
• Increase the acceleration and deceleration times (C1-01 through C1-04).
• Adjust the preset V/f pattern (E1-04 through E1-10) by reducing E1-08 and E1-10.
• Do not set E1-08 and E1-10 too low. This reduces load tolerance at low speeds.
• Check the motor rated current.
• Enter the motor rated current to parameter E2-01 as indicated on the motor nameplate.
• Ensure the motor cooling system is operating normally.
• Repair or replace the motor cooling system.
Motor Overheat (NTC Input)
The motor temperature exceeded the level set to L1-16 (or L1-18 for motor 2)
• Reduce the load.
• Check the ambient temperature.
Motor Overload
The electronic motor overload protection tripped
Reduce the load.
Increase the acceleration and deceleration times (C1-01 through C1-04).
• Reduce the load.
• Increase the speed.
• If the motor is supposed to operate at low speeds, either increase the motor capacity or use a motor
specifically designed to operate in the desired speed range.
• Adjust the user-set V/f pattern (E1-04 through E1-10) by reducing E1-08 and E1-10.
• Do not set E1-08 and E1-10 too low. This reduces load tolerance at low speeds.
• Check the motor-rated current.
• Enter the motor rated current to parameter E2-01 as indicated on the motor nameplate.
• Check the rated frequency indicated on the motor nameplate.
• Enter the rated frequency to E1-06 (Base Frequency).
Fault Name
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
YASKAWA TOEP YAIP1W 01F YASKAWA AC Drive - iQpump1000 User Manual