Gree GEH(09)AA-K3DNA1B/I, Service Manual

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9. Troubleshooting
Troubleshooting
9.1 Precautions before Performing Inspection or Repair
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.)
No. Troubleshooting procedure
1 Confirmation
2 Judgement by Flashing LED of Indoor/Outdoor Unit
3 How to Check simply the main part
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 Flashing LED of Indoor/Outdoor Unit and Primary Judgement
Be cautious during installation and maintenance. Do operation following the regulations to avoid electric shock and casualty or even
death due to drop from high a
l titude.
* 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 place and the safety, the maintenance can be performed.
Malfunction, status display table
Display of indicator Malfunction name Malfunction
type Dual-8
Operation
indicator Cooling
indicator Heating indicator
Communication
malfunction Hardware
malfunction E6 Blink 6 times
Malfunction protection
of jumper cap Hardware
malfunction C5 Blink 15 times
Without feedback of
indoor unit’s motor Hardware
malfunction H6 Blink 11 times Blink once
Indoor ambient
temperature sensor is
open/short-circuited
Hardware
malfunction F1 Blink twice
Indoor evaporator
sensor is
open/short-circuited
Hardware
malfunction F2