(2) How to check the air conditioning system with the needle of high low gauge
To connect with manifold pressure gauge can find the cause of air conditioning system.
Because manifold pressure gauge is various sensibly (Ambient Temp. is based on 30~35 °C)
Caution: Operating E/G RPM 1 500~2 000 is must, and so to that you can check the correct cause and air
conditioning. (In case below the figure of indicated pressure gauge has some clearance, confirm with
approximate indicated needle data.)
Gauge pressure conversion
z lb/in
2
=PSI
z 1 kg/cm
2
=14.223 lb/in
2
(Ex) 200 PSI=14 kgf/cm
2
FAULT SYMPTOM CAUSE SOLUTION
2. Engine
Low pressure or
not working
Engine operation
normal
Air supply clogged Remove
Evaporator freezes
Adjust the minimum
pressure
Fan switch damaged Replace the switch
Compressor Replace
Engine operation is
not normal
Engine failure Replace
Broken wire Replace
Air leak Pipe leak Check, tighten
Fan cannot be
operated
Engine
Pneumatic control switch
error
Check, tighten
Irregular engine
operation
Engine failure Replace
3. Clutch
Noise
Regular noise
Irregular noise
Collision with roller
Check the position of
the compressor
Disengagement
Disengaged
occasionally
Wire failure Check the wire
Always engaged
Press by hand
Large clutch play Adjust
Low voltage Check the battery
No wire defective Malfunction Replace
Slippage
Slippage during
rotation
Low voltage Check the battery
Clutch contaminated by
oil
Clean
Malfunction Replace
To Next Page
Loading...
Need help?
General