Group 31: Automatic Reset
This group denes conditions for automatic resets. An automatic reset occurs after a particular fault is detected. The
drive holds for a set delay time, then automatically restarts. You can limit the number of resets in a specied time
period, and you can set up automatic resets for a variety of faults.
Table 38: Group 31: Automatic Reset
Code Description Range Resolution Default S
3101 NR OF TRIALS 0…5 1 5
Sets the number of allowed automatic resets within a trial period dened by 3102 TRIAL TIME.
• If the number of automatic resets exceeds this limit (within the trial time), the drive prevents additional automatic resets and remains stopped.
• Starting then requires a successful reset performed from the control panel or from a source selected by 1604 FAULT RESET SEL.
Example: Three faults have occurred in the trial time. The last is reset only if the value for 3101 NR OF TRIALS is 3 or more.
3102 TRIAL TIME 1.0…600.0 s 0.1 s 30.0 s
Sets the time period used for counting and limiting the number of resets.
• See 3101 NR OF TRIALS.
3103 DELAY TIME 0.0…120.0 s 0.1 s 0.5 s
Sets the delay time between a fault detection and attempted drive restart.
• If DELAY TIME = zero, the drive resets immediately.
3104 AR OVERCURRENT 0, 1 1 0
Sets the automatic reset for the overcurrent function on or off.
0 = DISABLE – Disables automatic reset.
1 = ENABLE – Enables automatic reset.
• Automatically resets the fault (OVERCURRENT) after the delay set by 3103 DELAY TIME, and the drive resumes normal operation.
3105 AR OVERVOLTAGE DO NOT USE!! 0, 1 1 1
Sets the automatic reset for the overvoltage function on or off.
0 = DISABLE – Disables automatic reset.
1 = ENABLE – Enables automatic reset.
• Automatically resets the fault (DC OVERVOLT) after the delay set by 3103 DELAY TIME, and the drive resumes normal operation.
3106 AR UNDERVOLTAGE DO NOT USE!! 0, 1 1 1
Sets the automatic reset for the undervoltage function on or off.
0 = DISABLE – Disables automatic reset.
1 = ENABLE – Enables automatic reset.
• Automatically resets the fault (DC UNDERVOLTAGE) after the delay set by 3103 DELAY TIME, and the drive resumes normal operation.
3107 AR AI<MIN DO NOT USE!! 0, 1 1 1
Sets the automatic reset for the analog input less than minimum value function on or off.
0 = DISABLE – Disables automatic reset.
1 = ENABLE – Enables automatic reset.
• Automatically resets the fault (AI<MIN) after the delay set by 3103 DELAY TIME, and the drive resumes normal operation.
Warning! When the analog input signal is restored, the drive may restart, even after a long stop. Make sure that automatic, long delayed starts will not cause
physical injury and/or damage equipment.
3108 AR EXTERNAL FLT DO NOT USE!! 0, 1 1 1
Sets the automatic reset for external faults function on or off.
0 = DISABLE – Disables automatic reset.
1 = ENABLE – Enables automatic reset.
• Automatically resets the fault (EXTERNAL FAULT 1 or EXTERNAL FAULT 2) after the delay set by 3103 DELAY TIME, and the drive
resumes normal operation.
aCTual sIgnals and parameTers
www.DaikinApplied.com 55 OM 1190-1 • MD4 VFD
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