![background image](http://html1.mh-extra.com/html/lang/ecco-t/ecco-t_service-manual_3564747039.webp)
38
TROUBLESHOOTING ECCO-C
To help troubleshoot the oven you should perform the following “Manual Override” test:
Open drop down door located on the lower right side, directly below front panel.
Turn back up toggle (on/off) switch to “on” position.
Turn main power switch to “on” position.
Check oven for normal operation.
NO DISPLAY
PROBABLE CAUSE
CORRECTIVE ACTION
Power switch is not turned on
Turn power switch on.
Defective power switch
Check power switch for normal operation. Replace as necessary.
Defective back-up relay
Check relay for normal operation.
Check coil for 24 VAC.
If 24 VAC is measured.
Turn oven off and:
Check coil for 7.2 K
Ω
.
Replace as necessary.
If 24 VAC is not measured.
Verify that manual override switch is in “off” position.
Check manual override switch for normal operation.
Check wires for any shorts.
Defective control transformer
(12 VAC).
Check transformer for normal operation.
Check primary coil for 208/240 VAC and 630
Ω
. Check secondary
coil for no less than 10.5 VAC and 1
Ω
.
If voltage is not measured on primary:
Check wires for any shorts.
Check Power switch for normal operation.
If voltage is measured on primary:
Check for voltage on secondary.
Replace transformer.
Defective rectifier
Check for no less than 10.5 VAC on
TP1
and 5 VDC on
TP2
.
If correct voltage is present at
TP1
and present, but low at
TP2
unplug both ribbon connections from CPU and re-measure at
TP2
.
If voltage remains low at
TP2
replace CPU.
If voltage at
TP2
increased to 5 VDC when ribbon was unplugged,
plug ribbon back in to CPU and disconnect from Interface board.
Re-measure at
TP2
.
If voltage dropped to below 5 VDC replace ribbon cable.
If voltage remains at 5 VDC, plug ribbon back into Interface board
and measure for 5 VDC at
TP3
.
If voltage is present at
TP3
and display is still not on, press and hold
the
R/C
button on board if LED’s come on replace Interface board.
If LED segment does not illuminate or the LED is blank, replace
LED.
At this point you should have a display.
Summary of Contents for ECCO-T
Page 27: ...26 GENERAL CONT D ONE PAN TWO PAN THREE PAN FOUR PAN FIVE PAN https appliancetechmanuals com...
Page 53: ...52 WIRING DIAGRAM ECCO T 208 240 https appliancetechmanuals com...
Page 54: ...53 WIRING DIAGRAM ECCO T 480 https appliancetechmanuals com...
Page 55: ...54 WIRING DIAGRAM ECCO AP 208 240 https appliancetechmanuals com...
Page 56: ...55 WIRING DIAGRAM ECCO AP 480 https appliancetechmanuals com...
Page 57: ...56 WIRING DIAGRAM ECCO SII 208 240 https appliancetechmanuals com...
Page 58: ...57 WIRING DIAGRAM ECCO SII 480 https appliancetechmanuals com...
Page 59: ...58 WIRING DIAGRAM ECCO C 208 240 https appliancetechmanuals com...
Page 60: ...59 WIRING DIAGRAM ECCO C 480 https appliancetechmanuals com...
Page 61: ...60 WIRING DIAGRAM ECCO PP 208 240 https appliancetechmanuals com...
Page 62: ...61 WIRING DIAGRAM ECCO PP 480 https appliancetechmanuals com...
Page 63: ...62 WIRING DIAGRAM ECCO PT 208 240 https appliancetechmanuals com...
Page 64: ...63 WIRING DIAGRAM ECCO PT 480 https appliancetechmanuals com...