YMGI • Your Modern Green Idea
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
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TROUBLE SHOOTING
1. Preparation before service
Step 1: Confirm the model of the inverter A/C which needs repairing. Then find list of main parts that can be easily
damaged, and the part numbers of major components, especially the controller of outdoor unit;
Step 2: Based on the malfunction reported by user, determine the parts that will need to be replaced, and bring
tools with you for maintenance.
Step 3: You should not only bring the common tools, such as screwdrivers, wrenches, etc., but also you should
bring universal meter and ammeter with you.
2. During the maintenance, take care not to touch any terminals before the voltage between P and N of power
module is measured less than 50V to avoid electric shock.
3. Before or after the maintenance, check whether the user power socket, terminal block on indoor/ outdoor unit and
all connectors on main board (especially the main board of outdoor unit, power module and PFC module) are
loose or not.
