YORK YMC2 — VSD - 105% MOTOR CURRENT OVERLOAD

The panel reads VSD - 105% MOTOR CURRENT OVERLOAD. Both manuals print this message under the safety shutdown messages for this model, and only in this one wording — there are no variants. The leading VSD - is part of the display text exactly as printed.

The drive monitors the highest of the three motor RMS currents and compares it against 105% of the motor current limit of 525 A. If this value is exceeded continuously for 40 seconds, the shutdown is generated. The drive manual describes the same trip from the drive side: the 105% motor current overload value is based on the highest output current compared to the programmed Motor Current value displayed on the Control panel, and the motor current must be greater than that shutdown value for 40 continuous seconds for this shutdown to occur.

• The highest of the three motor RMS currents remained above 105% of the 525 A motor current limit continuously for 40 seconds.
• In the drive manual's terms, the overload value — 1.05 times the programmed Motor Current value shown on the Control panel — exceeded the shutdown value for 40 continuous seconds.
• The manuals attribute this shutdown solely to the sustained over-current condition; no other causes are listed for this message.

• Trip level: 105% of the motor current limit of 525 A.
• Duration: the trip value must be exceeded continuously for 40 seconds before the shutdown is generated.
• Timer reset: the 40 second timer resets if three consecutive RMS current values fall below the overload threshold.
• Drive-side calculation: the 105% motor current overload value is 1.05 times the programmed Motor Current value displayed on the Control panel.
• Maximum motor current overload shutdown value by drive model: 0490, 0490A — 490 Amps; 0612A — 612 Amps; 0730A — 730 Amps; 0774 — 774 Amps; 1278A — 1278 Amps.

The 40 second timer resets on its own once three consecutive RMS current values fall back below the overload threshold, but the shutdown is only lifted when the condition itself clears. The manual then gives one restart instruction: When the condition clears, the chiller can be started after the CLEAR FAULTS button is pressed. So the sequence is: let the current fall below the threshold, press the CLEAR FAULTS button, then start the chiller.