Gree GVH24AK-K3DNC6A - Rear Cover Assembly

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Installation and Maintenance
Service Manual
9.2 Procedure of Troubleshooting
1.For malfunction diagnosis please conduct according to the following owchart
Notes:
There’s electrolytic capacitor with big capacity on main board of outdoor unit. Even the power is cut off, there’s still high voltage in the
capacitor (DC 280V-380V; it’s related to input voltage). It takes more than 20mins for the voltage to decrease to safety range. If touch
the electrolytic capacitor within 20min after cutting off the power, it will cause electric shock. If it needs to maintain the unit after de-
energization, please discharge the electrolytic capacitor by the method as below:
1. Open the electric box cover of outdoor unit
2. As shown in below g. Insert the plug of discharging resistance (about 100 ohm, 20W) or electric soldering iron into the two points of
discharging positions (it will cause spark at the begging of contacting), keep about 30s, and then discharge the electrolytic capacitor.
After discharging and before maintenance, please use DC notch of universal meter to check whether discharge is nished to prevent
electric shock. If the voltage is less than 20V, you can maintain the unit safely. Prohibit discharging the electrolytic capacitor with current-
conducting object directly.
Malfunction conrmation
1. First check if the power source is normal.
Make sure that the power switch is closed and in supplying status;
2. Conrm the supply voltage
Make sure that the supply voltage is within the range of AC 200V~250V. If not, the unit may not operate normally.
Step Malfunction diagnosis procedure
1 Conrm malfunction
2 Read error code of indoor/outdoor unit and nd out the malfunction name
3 Troubleshooting and maintenance (see the contents hereinafter)
Discharging Position
Electric iron
plug
.
electric box cover
outdoor mainboard(AP1
)