YORK YK — VSD - High Phase A, B, or C input current

The panel shows VSD - High Phase A, B, or C input current. The manual prints the message in two capitalisations: VSD - High Phase A, B, or C input current in the Variable speed compressor drive cycling fault messages list, and VSD - High phase A, B, or C input current in the Variable speed compressor drive safety fault messages list, both under the Display messages of the OptiView Touchscreen Control Center. Both spellings refer to the same input current fault; the lower-case "phase" form is the one the manual uses for the safety shutdown entry.

For HYP model drives, this message reports that the stated phase input current exceeded 2,796 A. The first consequence of exceeding that level is a cycling shutdown, not a safety shutdown. The message also has a safety form: if three high input current cycling faults occur on any phase within 90 min, the third fault in the 90 min period causes a safety shutdown. In other words, an isolated event stops the chiller as a cycling event, while a repeated pattern within the 90 min window is escalated to a safety fault.

• For HYP model drives, the phase input current rose above the 2,796 A level, producing a high input current cycling shutdown.
• For the safety form of the message: three high input current cycling shutdown faults have occurred on any phase within 90 min, and the third fault in the 90 min period caused the safety shutdown.

1. Confirm the affected drive is an HYP model drive — the 2,796 A threshold and the behaviour described here are stated for HYP model drives.
2. Treat the first occurrence — phase input current above 2,796 A — as a cycling shutdown.
3. On the Systems Details screen, review the listed events and count the high input current faults: three faults on any phase within 90 min mean the third one has already caused a safety shutdown.

• Trip level: the stated phase input current exceeding 2,796 A (HYP model drives).
• Escalation window: 90 min.
• Escalation count: three high input current cycling faults on any phase within the 90 min period cause a safety shutdown.

The manual gives a restart path for the safety form of this message: The chiller can be started after the fault condition clears, and the Clear button is pressed next to the listed event on the Systems Details screen. Two conditions must be met before a restart: the fault condition itself must have cleared, and the event must be acknowledged with the Clear button next to its entry on the Systems Details screen. For a single cycling shutdown below the escalation pattern, the manual does not describe a separate reset procedure; the restart instruction above is the one given for this message.