THEORY OF OPERATION
MECHANICAL INSTALLATION
ELECTRICAL INSTALLATION
6.0 TROUBLESHOOTING
Dead Unit (No Display) Troubleshooting
1.Verify Main Power (between 90 VAC and 249 VAC, 50/60 Hz) is present on Main Power Cable (or Terminals) and Power Switch (located behind cover in upper left corner) is On.
Yes? Go to step 2.
No? Restore Main Power source.
2.With a volt meter capable of reading AC voltages between 90VAC and 249 VAC, and DC voltages around 20 VDC to 30 VDC, perform the following measurements on the Power Supply PCB:
Power Supply Input | Power Supply Output |
(Brown and Blue wires) | (Black and Red wires) |
PROGRAMMING
USER MODE
OPERATION
TROUBLESHOOTING
SPARE PARTS
LISTING
MAINTENANCE & SPECIFICATIONS
INDEX
AC Volts
90-240 VAC,
Yes: Measure Output
No: Go to 2a
2.a Recheck Main Power source, if Main Power present, replace Logic PCB.
Problem | Possible cause | Solution |
|
|
|
No voltage to main power | Tripped breakers or blown | Reset breakers or replace |
terminals | fuses at power source | fuse at power source |
| Main power wires | Check connections at plug |
|
| or washer power terminals |
|
|
|
Voltage at main power | Power supply failure | Replace power supply |
terminals, but LED display |
|
|
is not lit (see additional | Damaged logic circuit | Replace logic circuit board |
troubleshooting info above) | board |
|
|
|
|
Pumps run slowly or not at | Pumps not plugged in | Verify pump electrical |
all | properly | connectors are plugged in |
|
| properly |
| Pump failure |
|
|
| Replace failed pump |
|
|
|
Password will not access | Password has been changed | Call Nova Controls |
program mode |
| Customer Service for new |
|
| Logic PCB |
|
|
|
Pump runs but will not | Squeeze tube failure | Replace squeeze tube |
deliver product |
|
|
| Product tubing plugged | Replace product tubing |
| Pump roller failure | Replace pump roller |
|
|
|
Poor results | Squeeze tube failure | Replace squeeze tube |
| Product tubing plugged | Replace product tubing |
| Pump roller failure | Replace pump roller |
|
|
|
Dispenser not dispensing | Incorrect Operating Mode | Select appropriate |
upon request from washer | (Op) selected from | Operating Mode under (Op) |
| programming menu | in the programming menu |
| Signal wires are loose or | Check signal wiring to |
| wired incorrectly | washer |
|
|
|
+ DC Volts -
Yes: Replace Logic PCB
No: Replace Power Supply
Page 10 | P/N |
