1. Electric parts
It is compressor and motor fan that finally drives after power is supplied. And it is necessary to check the inter-
nal factors like switches, protectors, or lead wires that are needed to reach the compressor and motor fan to
see if their connections are normal and the external factors to see if voltage is normally supplied.
1.1 External factors check
1) Working power and voltage drop
The rated voltage for airconditioner is specified in a workable range.
In order to operate airconditioner normally, it is desirable for the working voltage and minimum. starting voltage
to be within the following chart range.
Especially, just the fact that the voltage when airconditioner is not at work is within the working voltage range is
insufficient, and the voltage is sure to be within the working voltage range by measuring in a operating condi-
tion.
* Usable voltage = Product rating ±10%
2) Electric wire capacity
The electric wire for airconditioner should have an allowable current more than the load current of the circuit
and be able to control the voltage drop by the load current within 2%.
And it should be a thickness capable of keeping the voltage drop by a starting current within -10%, and espe-
cially for an airconditioner of single phase, the voltage drop (Flicker voltage) by the starting currnet be within
about 5%.
A = V1 - V2 : Voltage drop by the starting current of airconditioner (Flicker voltage)
B = V1 - V3 : Voltage drop by the normal running current of airconditioner
In case of using an airconditioner in a low voltage area where power supply voltage is low, especially, the Flicker
voltage due to inadequate wires may cause the fluorescent light to be off or may affect the other electric products.
So, care should be taken to the wiring work.
lnput voltage (V1)
Voltage drop
V
oltage
Time
Starting voltage(V2)
Running voltage(V3)
V1 - V3
X
100
≤
2%(B case)
V1
V1 - V2
X
100
≤
5%(A case)
V1
TCL Air Conditioner Service Manual
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