Drive Overheat Warning; Motor Overheat - YASKAWA V1000 Series Installation & Start-Up Manual

5.5 Alarm Detection
Internal cooling fan has
stopped.
Airflow around the drive is
restricted.
LED Operator Display
oH2
Cause
An external device triggered
and overheat warning in the
drive.
LED Operator Display
oH3
Cause
Motor
thermostat
wiring is fault
(PTC input).
There is a fault on the
machine side (e.g., the
machine is locked up).
Motor has
overheated.
LED Operator Display
212
• Replace the cooling fan.
on page 254.
• After replacing the drive, reset the cooling fan maintenance
parameter to (o4-03 = "0").
• Provide proper installation space around the drive as indicated
in the manual.
page 42.
• Allow for the specified space and ensure that there is sufficient
circulation around the control panel.
• Check for dust or foreign materials clogging cooling fan.
• Clear debris caught in the fan that restricts air circulation.

Drive Overheat Warning

"Drive Overheat Warning" was input to a multi-function input terminal, S1 through
S7 (H1- = B).
• Search for the device that tripped the overheat warning.
• Solving the problem will clear the warning.

Motor Overheat

The motor overheat signal entered to a multi-function analog input terminal
exceeded the alarm level (H3-02 or H13-10 = E).
Repair the PTC input wiring.
• Check the status of the machine.
• Remove the cause of the fault.
• Check the load size, accel/decel times, and cycle times.
• Decrease the load.
• Increase accel and decel times (C1-01 to C1-08).
• Adjust the preset V/f pattern (E1-04 through E1-10). This will
mainly involve reducing E1-08 and E1-10. Note: Do not lower
E1-08 and E1-10 excessively, because this reduces 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.
YASKAWA ELECTRIC TOEP C710606 09B YASKAWA AC Drive V1000 Installation & Start-Up Manual
Refer to Cooling Fan Replacement
Refer to Correct Installation Spacing on
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
YES
YES
YES
Minor Fault (H2-
= 10)
YES
Minor Fault (H2-
= 10)
YES
YES