System Number Error Possible Cause Trouble Shooting
VACUUM -
LARGE -
VAC
13.6
Positive
Pressure
- Sensor on power distribution
board is bad
- Canister is pressurized
Note: This fault is caused by faulty
sensors or by actual positive
pressure in the sensor lines.
Although vacuum is negative
pressure, it is displayed as a positive
value on the screen. (i.e. 14 in/Hg)
So a negative pressure is displayed
as a positive value, and a positive
pressure is displayed as a negative
value. With no sensor lines
attached, the sensors should read
very close to zero. If the value
displayed in technician menu does
not change when the sensor lines
are removed, then the sensors are
bad. If it does change, then the
sensors were working properly and
the canister was pressurized. 13.1
and 13.3 will fault if lower than -.3
in/Hg (-.4, -.5, etc). Faults 13.2 and
13.4 will fault if higher than 24 in/Hg.
- Unplug all sensor lines on
power distribution board.
- Enter technician mode and go
to the level sensor LEVEL DATA
screen.
IF:
suction reads a negative
pressure, replace the power
distribution board.
suction reads a positive
pressure or zero, then the
canister is pressurized. Find out
what is causing the positive
pressure in the canister.
13.7 Overshoot
- Vacuum regulator can not
physically control the
amount of suction in the canister.
- Replace vacuum regulator
- Replace power distribution
board
13.8
Vacuum
Sensor
mismatch
- Vacuum sensor line is off or is
pinched
- Fluid in one of the vacuum sensor
lines
- Bad power distribution board
- Verify that sensor lines are
intact and properly installed.
- Clear fluid from sensor lines
- Replace power distribution
board
13.9
SPI Comm
Error
N/A N/A
13.10
Vacuum
Controller
Comm
Timeout
- Power distribution board failed
- Main control board failed
This fault usually accompanies other
errors. Clear the fault in technician
mode to verify if fault comes back. If
fault clears then problem does not
really exist. If it comes back,
continue troubleshooting using two
methods listed for this error code.
- Replace power distribution
board
- Replace main control board
5-30