Procedure Of Troubleshooting - Gree GVH24AK-K3DNC6A Service Manual

Service Manual

9.2 Procedure of Troubleshooting

1.For malfunction diagnosis please conduct according to the following flowchart
Step Malfunction diagnosis procedure
1 Confirm malfunction
2 Read error code of indoor/outdoor unit and find out the malfunction name
3 Troubleshooting and maintenance (see the contents hereinafter)
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 fig. 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 finished 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 confirmation
1. First check if the power source is normal.
Make sure that the power switch is closed and in supplying status;
2. Confirm 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.
Installation and Maintenance
.
electric box cover
outdoor mainboard(AP1)
Discharging Position
Electric iron
plug
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