15. Troubleshooting Guide
15.1 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 |
| Outlet air |
| Mpa |
| Temperature |
| (kg/cm2G) |
| (°C) |
Cooling Mode | 0.4 ~ 0.6 (4 ~ 6) |
| 12 ~ 16 |
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|
Condition: Indoor fan speed = High |
| ||
Outdoor temperature = 35°C |
| ||
Different in the intake |
|
|
| • | Measuring the air |
and outlet |
|
| Normal | ||
|
|
| temperature different | ||
air temperatures | More than 8°C |
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| (15 minutes after an |
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|
| |
| operation is started) |
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Less than 8°C at the cooling mode |
|
|
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Value of electric current | Higher than specified | Dusty condenser | • | Measuring electric current | |
|
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during operation |
|
| preventing heat radiation |
| during operation |
|
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| Excessive amount |
|
|
|
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| of refrigerant |
|
|
Lower than specified |
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|
| |
| Cooling | High |
|
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Gas side | Mode | Inefficient compressor | • | Measuring gas side | |
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pressure |
|
|
|
| pressure |
|
| Low | Insufficient refrigerant |
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| |
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| Low | Clogged strainer or |
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|
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| capillary cube |
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| 53 |
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