:
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
35
Main Parts Check
Temperature Sensor Checking
Disconnect the temperature sensor from the PCB, measure the resistance value with a tester.
Fig. 31 —Tester
Temperature Sensors
Room temp.(T1) sensor,
Indoor coil temp.(T2) sensor,
Outdoor coil temp.(T3) sensor,
Outdoor ambient temp.(T4) sensor,
Compressor discharge temp.(T5) sensor.
Measure the resistance value of each winding by using the multi-meter.
Indoor Fan Motor
Measure the resistance value of each winding by using the tester.
Fig. 32 — Indoor AC Fan Motor
Table 14 — Resistance Value
Table 15 — Fan Motor
DIGITAL TESTER
NORMAL
RESISTANCE
VALUE
DIGITAL TESTER NORMAL RESISTANCE VALUE
(+) RED (-) BLACK
∞
(Several MΩ)
(+) RED (-) BLACK
∞
(Several MΩ)
P
NU
N
UV
VW
W(+) Red
MODEL YKFG-15-4-28-1 YKFG-20-4-10L YKFG-28-4-6-5 YKFG-45-4-13
BRAND
Welling Welling Welling Dongfang
BLACK – RED MAIN
Ω
75
Ω
269
Ω
183.6
Ω
125.2
Ω
BLUE – BLACK AUX
Ω
150
Ω
224
Ω
206
Ω
83.8
Ω
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