InnoVet Select
™
HF APR
Service Manual
69
10.2 Troubleshooting Guide
EEPROM READ/WRITE ERROR
If at any point during normal operation the calibration data stored within the
Operator Console and within the Power Moudle are in disagreement this error code
will display. Cycling power will usually clear the error. See section 11.0 below.
EEPROM CHECK-SUM CORRUPT
If during boot-up of the system the calibration data stored within the Operator
Console and the Power Module are in disagreement this error code will display.
Reload factory defaults through the MEMORY FUNC screen described below.
ERROR LOW FILAMENT AMPS
There is little or no filament current. Verify that filament supply voltage is present at
the filament pcb and that there is continuity in the high voltage secondary. If
problem occurs at exposure, inspect the mA waveform with and without mA
feedback enabled. Confirm LED 1 and 2 are lit on Filament pcb. Check fuses on
Filament pcb.
ERROR HI FILAMENT AMPS
This can occur with mA feedback ON and a leading edge which is too high or too
low. The mA stabilizer can overcompensate for the filament number and generate
this error code. Confirm feedback circuit integrity of about 68 ohms between H9-4
and H9-5 as well as between H9-4 and H9-6 on System controller pcb. Also
inspect the Filament pcb for shorted components.
mA OVERLOAD
Excessive mA. Can come from poorly adjusted mA stabilizer or leading edge.
Secondary arc in the mA circuit is possible. Scope the mA waveform with feedback
enabled and disabled to determine cause.
ERROR IPM OVERLOAD
Can be tied to mA OVERLOAD, coming from a misadjustment of mA. Can come
from excessive inverter capacitor bank voltage; confirm line matching transformer
tap voltage feeding capacitor bank does not exceed 256 VAC on TB1. Check for
proper supply voltages on IPM Driver pcb. Secondary arcing possible, less likely
than above.
kV IMBALANCE
Anode or cathode kVp is missing or wrong polarity. On System Controller board
confirm 10k ohms between H9-3 and H9-1 as well as between H9-3 and H9-1.
Confirm a positive signal on R71, negative signal on R70 of equal amplitude during
exposure. Check for induced noise on these kV feedback signals, and reroute
feedback cables between high voltage transformer and power module.