Inspection, Maintenance and Adjustment
4-50
Check Air Conditioner Refrigerant
1.
Run engine at about 1,800 rpm. Operate for a minimum of
ten minutes to stabilize the system.
2.
Press the "HI" fan speed switch to set maximum air flow.
3.
Put the temperature control switch in maximum cooling
position.
4.
Press the "Internal Air Circulation" switch.
5.
Compare the flow of bubbles in the sight glass of receiver
dryer with the drawings in the following table.
Check and Adjust Engine **
Contact your nearest
DOOSAN
dealer.
Engine dealer for checking and adjusting the following items:
•
Engine Compression Pressure.
•
Injection Pressure.
•
Injection Timing.
FG016137
Figure 89
WARNING
Mixing of tobacco smoke and freon is deadly.
Do not smoke while servicing or recharging
air-conditioning system.
CAUTION
Overfilling refrigerant may cause dangerous
high-pressure and poor cooling action; and low
refrigerant level may cause compressor damage.
Always maintain refrigerant at normal level.
Amount of
Refrigerant
Appearance of the Sight Glass
Solutions
Normal
Almost clear.
Any bubbles disappear.
High
No bubbles are seen.
Charge or withdraw the system with
the correct amount of HFC-134a
refrigerant.
Low
A flow of bubbles is visible.
Summary of Contents for DX700LC
Page 2: ......
Page 72: ...OP001120 Safety 1 66 ...
Page 142: ...OP001121 Operating Controls 2 70 ...
Page 188: ...OP001122 Operation 3 46 ...
Page 197: ...OP001123 4 9 Inspection Maintenance and Adjustment ...
Page 282: ...OP001123 Inspection Maintenance and Adjustment 4 94 ...
Page 298: ...OP000030 Troubleshooting 6 6 ...
Page 301: ...OP001125 7 3 Specification ...
Page 308: ...OP001125 Specification 7 10 ...
Page 314: ...950106 00012E Index 8 6 ...