Ipm Continuity Check; Fan Motor - Carrier 38MHRC Service Manual

DIAGNOSIS AND SOLUTION (CONT)

IPM Continuity Check

Turn the power off, let the large capacity electrolytic capacitors discharge completely, then dismount the IPM. Use a digital tester to measure the
resistance between P and UVWN; UVW and N.
DIGITAL TESTER
(+)Red (-)Black
N
U
P
V
W

Fan Motor

Measure the resistance value of each winding by using the tester.
MODEL
Brand
Black – Red (Main)
Blue –Black (AUX)
48
Table 18 — IPM Continuity Check
NORMAL RESISTANCE
VALUE
∞
(Several MΩ)
Table 19 — Fan Motor
YKT-32-6-202L
Tongde
Ω 86
Ω 64
Specifications subject to change without notice.
DIGITAL TESTER
(+)Red (-)Black
U
V
N
W
(+)Red
YKT-32-6-3L YKT-48-6-206
Welling Welling
213 152
156 142
NORMAL RESISTANCE
VALUE
∞
(Several MΩ)
YKT-63-6-200L
Welling
88.5
138
SG-38MHRC-01