Technical data

Table Of Contents
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6 720 803 687 (2012/11)70
10.2.7 CHECK COMPONENTS
Component Points and criteria to check Illustration
Temperature sensor:
•Liquid line TH3
•Hot gas TH4
Evaporator TH6
Fresh air TH7
Heat deflector TH8
Compressor shell TH32
Outdoor pipes TH33
Check the temperature sensor resistance (sensor
temperature range from 10 °C to 30 °C).
TH3, TH6, TH7, TH33:
Standard: 4.3 k – 9.6 k
Faulty: circuit open / short circuit
TH4, TH32:
Standard: 160 k – 410 k
Faulty: circuit open / short circuit
TH8:
Standard: 93 k – 105 k
Faulty: circuit open / short circuit
4-way valve Check resistance across terminals (20 °C ambient
temperature).
Standard: 2350 170
Faulty: circuit open / short circuit
Compressor motor MC Check winding resistance across terminals (20 °C winding
temperature).
U-V: 0.64
•U-W: 0.64
V-W: 0.64
Faulty: circuit open / short circuit
Linear expansion valve (LEV-A / LEV-
B)
Pull plug and check winding resistance across contacts (20 °C
ambient temperature).
Red-white: 46  4
Red-orange: 46  4
Brown-yellow: 46  4
Brown-blue: 46  4
Faulty: circuit open / short circuit
Table 40 Check components
W
V
U
1
2
3
4
5
6
M
Red
Brown
Blue
Orange
Yellow
White