HAIMA 7 - Performance Test of Cooling System

Performance test of cooling system
U-5
Performance test of cooling system
1. follow refrigerant charge inspection and
cooling system pressure inspection procedure.
(refer to section u, refrigerant charge inspection)
(refer to section u refrigerant pressure
inspection.) If it does not meet the technical
requirements, diagnose and eliminate the faults
of cooling system.(refer to section u,
troubleshooting index.) If they are correct, go
to the next step.
2. place a dry-bulb thermometer in central air port
at driver side.
3. open the engine hood.
4. warm up the engine to normal operation
temperature and keep it running at a constant
revolution of 1,500 rpm.
5. set front fan switch at 4
th
position.
6. turn on a/c switch.
7. set the reciculate indoor mode.
8. set the temperature control to max cold.
9. set vent mode.
10 close all doors and windows.
11. wait until the central air port temperature is
stable, and then the outlet air temperature is
also stable. The a/c compressor is repeatedly
turned on and off under control of the
temperature sensor.
12. measure central air port temperature.
13. measure the ambient temperature.
14. verify that intersection of the central air port
temperature and ambient temperature is in the
shaded zone. If not, diagnose and remove any
troubles in the cooling system. (refer to section
u, troubleshooting index)
Outlet temperature
Ambient temperature
Central air port temperature