Troubleshooting Table - AccuTemp Evolution Service Manual

3.1 Troubleshooting Table

REF
POSSIBLE CAUSE
LETTER
Power cord disconnected.
A
Power cord damaged/
broken.
Breaker is tripped.
B
Transformer
Fuses (1.25A)
Overtemp Switch
C
Control Panel not responding
to input.
SP8026-1909
TROUBLESHOOTING STEPS
Confirm proper voltage is present at receptacle.
Plug-in Power Cord.
Call Accutemp to confirm power to unit and secure
correct part # for cord/plug assembly.
Reset breaker.
Confirm supply has correct phase and incoming
voltage on primary side.
Confirm 24-32V output on secondary side.
If no output on secondary, ohm between secondary
terminals to check for shorted coil.
Test across fuses.
Check for 24V across fuse. If 24V present across fuse,
the fuse has failed.
If the overtemp switch is open - the overtemp alert
light should be illuminated.
To confirm failure, check for voltage between the
Common wire attached to terminal #6 on Control
Relay 1 (AC) and the common wire (yellow) on the
transformers secondary side.
If no voltage the overtemp switch is open
Unplug the unit whenever disconnecting wires for the
main control board.
Check for incoming 24VAC on wires attached to J2-1
& J2-2 on the control board.
If voltage is present, the control board has failed.
When a failure on the board is confirmed - inspect the
unit for water infiltration as a precaution against future
failure.
EVOLUTION ELECTRIC STEAMER
14