Carrier 38MAQB09-1 - IPM Continuity Check

50
IPM Continuity Check
Turn off the power, let the large capacity electrolytic capacitors discharge completely, and dismount the IPM. Use a digital tester to measure
the resistance between P and UVWN; UVW and N.
Table 25—Digital Tester
DIGITAL TESTER
NORMAL RESISTANCE
VALUE
DIGITAL TESTER
NORMAL RESISTANCE
VALUE
(+)Red (-)Black
∞
(Several MΩ)
(+)Red (-)Black
∞
(Several MΩ)
P
N
U
N
U
V
V
W
W
(+)Red
Pressure on Service Port
Heating Charts
Table 26—Heating Chart
° F (° C)
ODT/IDT
57/53
(13.89/11.67)
47/43
(8.33/6.11)
37/33
(2.78/0.56)
27/33
(-2.78/-5)
17/13
(-8.33/-10.56)
BAR 55 30.3 28.5 25.3 22.8 20.8
BAR 65 32.5 30.0 26.6 25.4 23.3
BAR 75 33.8 31.5 27.8 26.3 24.9
Table 27—Heating Chart
° F (° C)
ODT/IDT
57/53
(13.89/11.67)
47/43
(8.33/6.11)
37/33
(2.78/0.56)
27/33
(-2.78/-5)
17/13
(-8.33/-10.56)
PSI 55 439 413 367 330 302
PSI 65 471 435 386 368 339
PSI 75 489 457 403 381 362
Table 28—Heating Chart
° F (° C)
ODT/IDT
57/53
(13.89/11.67)
47/43
(8.33/6.11)
37/33
(2.78/0.56)
27/33
(-2.78/-5)
17/13
(-8.33/-10.56)
MPA 55 3.03 2.85 2.53 2.28 2.08
MPA 65 3.25 3.00 2.66 2.54 2.33
MPA 75 3.38 3.15 2.78 2.63 2.49
Fig. 43 – Heating Chart