UNIT MAINTENANCE &
SER
VICE GUIDE
P28 OF 44
P27 OF 44
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
Notice
1) Preparation before service
Step 1: Firstly, confirm the model of the inverter A/C which needs repairing, and then find out model of main
parts that can be damaged easily and the material encode, especially the controller of outdoor unit;
Step 2: Based on the malfunction reflected by user, determine the parts that will need to be replaced, and bring
tools with you for maintenance.
Step 3: As for repairing the inverter A/C, you should not only bring the common tools, such as screwdriver,
wrench, etc, but also you should bring universal meter and ammeter with you.
2) During the maintenance, don't 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, you should check whether the users 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 loosened or not.
GENERAL PROCEDURES
TROUBLE SHOOTING
OPTIMUM OPERATION
Adjust the room temperature properly
Adjust the room temperature properly for a
comfortable environment.
Never place anything under the indoor unit that is to be kept dry
Turn off the main power supply swittch when it is not to be used for long periods of time
Do not open the doors and windows for a long time when air conditioner is operating
Place TV, radio, stereo, etc. at least 1m away from the indoor unit and the remote control
Avoid direct air flow to pets and plants
Water may drop from the indoor unit when the
humidity is over 80% or when the drainage outlet
is clogged.
When the main power switch is truned on, some
watts of electricity is being used even if the
system is not operating.
Turn off the main power supply switch to save
energy.
Cooling and heating performance will be affected
if the doors and windows are open for an extended
period of time.
It may cause interference in the picture or sound.
It may do harm to them.
UNIT MAINTENANCE &
SER
VICE GUIDE