60
14. Troubleshooting
Guide
14.1 Refrigeration Cycle System
In order to diagnose malfunctions, ensure the air conditioner is free
from electrical problems before inspecting the refrigeration cycle.
Such problems include insufficient insulation, problem with the
power source, malfunction of a compressor and a fan. The normal
outlet air temperature and pressure of the refrigeration cycle
depends on various conditions, the standard values for them are
shown in the table to the right.
Normal Pressure and Outlet Air Temperature (Standard)
Gas Pressure
Mpa
(kg/cm
2
G)
Outlet air
Temperature
(°C)
Cooling Mode
0.9 ~ 1.2 (9 ~ 12)
12 ~ 16
Condition: Indoor fan speed = High
Outdoor temperature = 35°C at cooling mode.
Compressor operate at rated frequency
Different in the intake
and outlet
air temperatures
Normal
Value of electric current
during operation
Dusty condenser
preventing heat radiation
Excessive amount
of refrigerant
Gas side
pressure
Inefficient compressor
Insufficient refrigerant
Clogged strainer or
capillary cube
•
Measuring the air
temperature different
•
Measuring electric current
during operation
•
Measuring gas side
pressure
More than 8
°
C
(15 minutes after an
operation is started) at
cooling mode.
Less than 8
°
C at the cooling mode
Higher than specified
Cooling
Mode
High
Low
Low
Lower than specified
Summary of Contents for CS-S9NKR
Page 11: ...11 3 Location of Controls and Components 3 1 Indoor Unit 3 2 Outdoor Unit 3 3 Remote Control...
Page 12: ...12 4 Dimensions 4 1 Indoor Unit 4 1 1 CS S9NKR CS S12NKR...
Page 13: ...13 4 1 2 CS S18NKR CS S24NKR CS S28NKR...
Page 14: ...14 4 2 Outdoor Unit 4 2 1 CU S9NKR CU S12NKR 4 2 2 CU S18NKR CU S24NKR CU S28NKR...
Page 15: ...15 5 Refrigeration Cycle Diagram 5 1 CS S9NKR CU S9NKR CS S12NKR CU S12NKR...
Page 16: ...16 5 2 CS S18NKR CU S18NKR CS S24NKR CU S24NKR CS S28NKR CU S28NKR...
Page 17: ...17 6 Block Diagram 6 1 CS S9NKR CU S9NKR CS S12NKR CU S12NKR...
Page 18: ...18 6 2 CS S18NKR CU S18NKR...
Page 19: ...19 6 3 CS S24NKR CU S24NKR...
Page 20: ...20 6 4 CS S28NKR CU S28NKR...
Page 21: ...21 7 Wiring Connection Diagram 7 1 Indoor Unit 7 1 1 CS S9NKR CS S12NKR...
Page 22: ...22 7 1 2 CS S18NKR CS S24NKR CS S28NKR...
Page 25: ...25 7 2 3 CU S24NKR...
Page 26: ...26 7 2 4 CU S28NKR...
Page 27: ...27 8 Electronic Circuit Diagram 8 1 Indoor Unit 8 1 1 CS S9NKR CS S12NKR...
Page 28: ...28 8 1 2 CS S18NKR CS S24NKR CS S28NKR...
Page 29: ...29 8 2 Outdoor Unit 8 2 1 CU S9NKR CU S12NKR...
Page 30: ...30 8 2 2 CU S18NKR...
Page 31: ...31 8 2 3 CU S24NKR...
Page 32: ...32 8 2 4 CU S28NKR...
Page 34: ...34 9 1 1 2 CS S18NKR CS S24NKR CS S28NKR 9 1 2 Indicator Printed Circuit Board...
Page 35: ...35 9 2 Outdoor Unit 9 2 1 Main Printed Circuit Board 9 2 1 1 CU S9NKR CU S12NKR...
Page 36: ...36 CN DEMAND AC GND CN PWR...
Page 37: ...37 9 2 2 CU S18NKR...
Page 38: ...38 9 2 3 CU S24NKR CU S28NKR...
Page 42: ...42...
Page 90: ...90 Figure 3 Figure 4 15 1 1 3 To remove discharge grille Figure 5...
Page 92: ...92 Figure 9 Figure 10...
Page 96: ...96 Figure 20 Figure 21...
Page 124: ...124 Printed in Malaysia SB0712 0...