Product specifications
Chapter 7 Troubleshooting
HA-680_V04
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Operating temperature error (Alarm clear: not available)
● Description
The alarm occurs when the temperature of the HA-680 main unit increases and the temperature sensor
trips. To release the alarm after troubleshooting, shut off the control power and turn it on again.
● Diagnostic tips
(1) Alarm occurs when the control circuit power is turned on:
◆ Cause 1: Failure of the temperature sensor of the HA-680 driver.
⇒ Remedy: Contact Harmonic Drive Systems. (Replace the HA-680 driver)
(2) Alarm occurs while the motor is running:
◆ Cause 1: The motor is in an overload state while running.
⇒ Remedy: Review the effective load factor of the actuator to reduce the load factor.
◆ Cause 2: The ambient temperature around the HA-680 driver is over 50°C.
⇒ Remedy: Review the installation location and cooling system of the HA-680 driver.
System error (Alarm clear: not available)
● Description
This alarm occurs when an error of the current detection circuit is detected. To release the alarm after
troubleshooting, shut off the control power and turn it on again.
● Diagnostic tips
(1) Alarm occurs when the control circuit power is turned on:
◆ Cause 1: Failure of the current detection circuit of the HA-680 driver
⇒ Remedy: Contact Harmonic Drive Systems. (Replace the HA-680 driver)
(2) Alarm occurs occasionally while the motor is running:
◆ Cause 1: Malfunction due to external noise
⇒ Remedy: Take noise prevention measures according to “3-4 Suppressing noise” in
this manual.
◆ Cause 2: Failure of the current detection circuit of the HA-680 driver
⇒ Remedy: Contact Harmonic Drive Systems. (Replace the HA-680 driver)