Carrier 40MB C Series Service Manual page 33

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.
Digital Tester
(+) Red (-) Black
N
U
P
V
W
Pressure on Service Port
_F _C
BAR
BAR
BAR
PSI
PSI
PSI
MPA
MPA
MPA
Pressure (bar)
12.0
10.0
8.0
6.0
4.0
2.0
0.0
75
Table 12— IPM Continuity Check
Normal Resistance value
∞
(Several M W)
Table 13—Cooling Chart
Indoor Temp.
75 (23.89)
70
75
80
70
75
80
70
75
80
23.89 85 29.44 95
35
Fig. 42 – Pressure Bar
Digital Tester
(+) Red (-) Black
U
V
N
W
(+) Red
Outdoor Temp.
85 (29.44) 95 (35)
8.2 7.8 8.1
8.6 8.3 8.7
9.3 8.9 9.1
119 113 117
124 120 126
135 129 132
0.82 0.78 0.81
0.86 0.83 0.87
0.93 0.89 0.91
105 40.56 115 46.11
33
Normal Resistance Value
∞
(Several M W)
105 (40.56) 115 (46.11)
8.6 10.1
9.1 10.7
9.6 11.2
125 147
132 155
140 162
0.86 1.01
0.91 1.07
0.96 1.12
70
75
80
Outdoor temp.