Doosan 50001, Руководство по ремонту

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SP001687 Electrical System
Page 52
TROUBLESHOOTING
Refrigerant Pressure Check
1. Open all doors and windows.
2. Install manifold gauge set.
3. Start engine and maintain engine speed at 1,800 - 2,000
rpm.
4. Check high / low-pressure of refrigerant.
LO HI
HDA6074L
Figure 36
1
High-pressure: 8 - 10 kg/cm
2
(114 - 142 psi)
Low-pressure: Approximately 1 kg/cm
2
(14 psi)
Possible Cause: Low Refrigerant Level
Step Inspection Item Remedy
1 Check for traces of refrigerant oil.
Yes
Reassemble using correct
tightening torque.
No Go to next step.
2
Using a leak detection device or soapy water
check for refrigerant leakage at all major
components and joints. Yes Repair leaking component.
No Recharge system to correct
pressure.
2
High-pressure: Over 23 kg/cm
2
(327 psi)
Low-pressure: Approximately 2.5 - 3 kg/cm
2
(35 - 42 psi)
Possible Cause: Overcharge, Frost on condenser
Step Inspection Item Remedy
1
Check for condenser pin damage or
contamination.
Yes
Clean, repair or replace
condenser.
No Refrigerant overcharge.