The data, information and descriptions, and the technology described herein are the exclusive intellectual property of Ecotechnics S.p.A. and constitute industrial
secrets. Said information is communicated in strict confidentiality; said information may be used only for the purpose for which it is communicated; said information
may not be divulged, communicated, or revealed to third parties and/or reproduced by any means for any reason whatsoever; said information is protected under
applicable Italian competition and industrial property law.
pag.20 - 18/10/2005
Service manual VA500-VA750 ed.1 ver.5.05 [MANU360.SA0].doc
VACUUM PUMP RUNS, BUT LOW SIDE GAUGE DOES NOT REGISTER AN
APPROPRIATE VACUUM
- Possible leak into the A/C system, close both quick coupler, if the now the vacuum is
reached it means there is a leak into the A/C system of the car.
- Pump oil insufficient or contaminated: refill or decontaminate the vacuum pump oil
- If the pump start and the immediately stops visualizing ERROR “02", verify and if
necessary substitute the check valve n°1
THE MACHINE DOESN’T FINISH THE REFILLING
- Close HP valve, left open the LP valve in front of the machine, start the engine of the
car, turn on the A/C system, let the compressor of the A/C system suck the remaining
refrigerant.
- If the problem reiterate continuously, proceed with the following verification:
1. bottle pressure > LP and HP
a. verify if the needle of the HP and LP quick coupler reach the valve
inside the male fitting
b. verify if hose or the capillary for the refilling (the one under the refilling
electronic valve EV5) is obstructed
2. bottle pressure < LP and HP
a. verify the calibration of the refrigerant load cell, it could possible a shift
of the “zero” (that is the availability displayed > of the real one)
THE MACHINE DOESN’T REFILL THE OIL
- Verify the functioning of the new oil manual valve
- New oil hose (Ton) obstructed or restricted
THE MANOMETERS DON’T READ THE PRESSURE OF THE A/C SYSTEM
- the quick coupler is closed, verify the corresponding stinger inside of the quick coupler
- service hoses gasket obstructed
- manometer capillary line obstructed (rare)
PROBLEMS DURING THE DOWNLOAD OF THE SOFTWARE
- The software “ECKPC” doesn’t find the machine:
1. The serial cable RS232 isn’t direct (pit to pin), turn off the machine and check the
serial wiring
2. wrong connection port
3. wrong bit rate, set up to 19200 baud rate
SCALE DOESN’T READ THE WEIGHT
- the bottle fix bolt touches the bottle plate, remove it (only for refrigerant scale)
- the scale pin-connector isn’t correctly plugged to the motherboard
- during calibration electrical level is always 4096:
1. verify the right sequence (refer to WIRING paragraph) of the colour of the wire into
the pin-connector of the scale
2. verify that the pin-connector “AMP MOD II” of the motherboard aren’t short-
circuited: check the voltage between PIN 2 and PIN 3, if the voltage is > 100 mV
clear the pin-connector or replace the motherboard
