Troubleshooting; Precautions Before Performing Inspection Or Repair; Confirmation; Judgement By Flashing Led Of Indoor/Outdoor Unit - Gree GWH18PD-K3NNA1A Service Manual

9. Troubleshooting

9.1 Precautions before Performing Inspection or Repair

Be cautious during installation and maintenance. Do operation following the regulations to avoid electricshock
and casualty oreven death due to drop from high attitude.
* Static maintenance is the maintenance during de-energization of the air conditioner.For static maintenance, make sure that the
unit is de-energized and the plug is disconnected.
* dynamic maintenance is the maintenance during energization of the unit.Before dynamic maintenance, check the electricity
and ensure that there is ground wire on the site. Check if there is electricity on the housing and connection copper pipe of the air
conditioner with voltage tester. After ensure insulation placeand the safety, the maintenance can be performed.
Take sufficient care to avoid directly touching any of the circuit parts without first turning off the power.
At times such as when the circuit board is to be replaced, place the circuit board assembly in a vertical position.
Normally,diagnose troubles according to the trouble diagnosis procedure as described below.(Refer to the check points in servicing
written on the wiring diagrams attached to the indoor/outdoor units.)

9.2 Confirmation

(1)Confirmation of Power Supply
Confirm that the power breaker operates(ON) normally;
(2)Confirmation of Power Voltage
Confirm that power voltage is AC 220-230-240 ±10%.
If power voltage is not in this range, the unit may not operate normally.

9.3 Judgement by Flashing LED of Indoor/Outdoor Unit

Note:GWH18PD-K3NNA1A(CA414000100) GWH24PD-K3NNA1A(CA414000202) 无双八显示。
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No. Troubleshooting procedure
1 Confirmation
2 Judgement by Flashing LED of Indoor/Outdoor Unit
3 How to Check simply the main part
Troubleshooting