Page 1285 - Foton Workshop Manual - Aumark (BJ1099)

HEATING AND AIR CONDITIONING - HEATING AND AIR CONDITIONING 41-5

1. Compressor assembly with electromagnetic clutch
(a). Connect the positive terminal of the compressor to that of the battery and the
negative terminal of the compressor to the body grounding.
(b). Check whether the magnetic clutch is closed.
If not, replace the compressor assembly.
2. Heater
Add some coolant into the heater and check for leakage.
3. A/C Pipe
Leakage test: Fill the pipes with dry helium, with 3.5 MPa in the high-pressure pipe
and 1.67 MPa in the low-pressure pipe. Immerse the pipes in water for 5 minutes
and check for bubbles.
4. Evaporator
Leakage test: Inject the pressure of 1.67 MPa into the evaporator, immerse it in
water for 5 minutes and check bubbles.
5. Condenser
Leakage test: Inject the pressure of 3.5 MPa into the condenser, immerse it in water
for 3 minutes and check bubbles.

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