Carrier DHMVHA Service Manual page 35

:
Main Parts Check
Temperature Sensor Checking
Disconnect the temperature sensor from the PCB, measure the resistance value with a 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.
DIGITAL TESTER
(+) RED (-) BLACK
N
U
P
V
W
MODEL
BRAND
BLACK – RED MAIN
BLUE – BLACK AUX
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Fig. 31 —Tester
Fig. 32 — Indoor AC Fan Motor
Table 14 — Resistance Value
NORMAL
RESISTANCE
VALUE
(+) RED
∞
(Several MΩ)
Table 15 — Fan Motor
YKFG-15-4-28-1
Welling
75
Ω Ω
150
Ω Ω
DIGITAL TESTER
(-) BLACK
U
V
N
W
(+) Red
YKFG-20-4-10L
Welling
269
Ω
224
Ω
35
NORMAL RESISTANCE VALUE
∞
(Several MΩ)
YKFG-28-4-6-5 YKFG-45-4-13
Welling Dongfang
183.6 125.2
Ω
206 83.8
Ω
Ω
Ω