45
DIAGNOSIS AND SOLUTION (CONT)
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 21—IPM Continuity Check
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
Fan Motor
Measure the resistance value of each winding by using the tester.
Table 22—Fan Motor
Model
YKT-32-6-202L
YKT-32-6-3L
YKT-48-6-206
YKT-63-6-200L
Brand
Tongde
Welling
Welling
Welling
Black – Red (Main)
Ω
86
213
152
88.5
Blue –Black (AUX)
Ω
64
156
142
138
Summary of Contents for 38MHRB series
Page 7: ...7 DIMENSIONS OUTDOOR CONT Unit inch mm Fig 3 Size 24K...
Page 11: ...11 WIRING DIAGRAMS COOLING ONLY Fig 7 Wiring Diagram Size Cooling Only Size 12K 115V...
Page 12: ...12 WIRING DIAGRAMS COOLING ONLY CONTINUED Fig 8 Wiring Diagram Cooling Only Size 12K 230V...
Page 13: ...13 WIRING DIAGRAMS COOLING ONLY CONTINUED Fig 9 Wiring Diagram Cooling Only Sizes 18 24K...
Page 14: ...14 WIRING DIAGRAMS HEAT PUMP Fig 10 Wiring Diagram Heat Pump Size 12K 115V...
Page 15: ...15 WIRING DIAGRAMS HEAT PUMP CONTINUED Fig 11 Wiring Diagram Heat Pump Sizes 09 12 18 230V...
Page 16: ...16 WIRING DIAGRAMS HEAT PUMP CONTINUED Fig 12 Wiring Diagram Heat Pump Size 24 230V...
Page 37: ...37 DIAGNOSIS AND SOLUTION CONT Fig 36 P U Fig 37 P V...
Page 38: ...38 DIAGNOSIS AND SOLUTION CONT Fig 38 P W Fig 39 N U...
Page 39: ...39 DIAGNOSIS AND SOLUTION CONT Fig 40 N V Fig 41 N W...