STERO SD3 Series, Service And Parts Manual, Page: 33 / 71

ERROR CODES (IN SERVICE DIAGNOSTICS SCREEN)
Left Digit (1) Right Digit (1) Description of Error
- - Normal operation. No recorded errors.
- d Slow Leak.
- E Booster set point timeout (480 sec. after initial fill).
- F Control board E-prom error.
- 2 Water not to float on initial fill.
- 6
Float or temperature thermistor(s) open or connector J1 on control board
is open.
1 - Wash thermistor error.
2 - Rinse thermistor error.
3 - Booster thermistor error.
SERVICE DIAGNOSTICS CHART
TEST ACTIVE KEY KEY RESPONSE DISPLAY DATA
Recorded Error
▲ (arrow) Reset recorded error(s) Error messages (see ERROR
CODES table).
NOTE: Only the most recent
error recorded for each digit (left/
right) are stored and displayed.
Previously recorded errors are
overwritten.
Select Jump to display test.
Display Test
▲ (arrow) Step through display test.
Sequences LED segments on
display board for test.
Select Jump to Keypad Test.
CYCLE, ▲ and PROG
Switch Test
—
Pressing any of the switches
under test displays a
corresponding number for that
switch.
Display key number:
CYCLE (keypad) = 1
▲ (control board) = 2
PROG (control board) = 3
Select Jump to Revision Level display.
Software Revision Level
Display
▲ (arrow) No change
Display Revision Level of
Software.
Select Jump to Wash Temp
Tank Temperature Select Jump to Rinse Temp
Tank temp and WASH icon.
Thermistor errors are indicated
as 'oP' or 'SP' for open or shorted
thermistors respectively.
Rinse Temperature Select Jump to Booster Temp
Rinse temp and RINSE icon.
Thermistor errors are indicated
as 'oP' or 'SP' for open or shorted
thermistors respectively.
Booster Temperature (AH
only)
Select Jump to Cycle Counter Display
Booster temp and WASH/
RINSE icons. Thermistor errors
are indicated as 'oP' or 'SP' for
open or shorted thermistors
respectively.
SD3 Series - TROUBLESHOOTING
Page 33 of 37 F45576 (1015)