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41
TROUBLESHOOTING ECCO-C CONT’D
NO HEAT Computer Mode
PROBABLE CAUSE
CORRECTIVE ACTION
No 24 VAC on Interface board
Check for 24 VAC at
TP4
to ground.
If 24 VAC is not measured:
Check for 24 VAC at “
NC
” contacts on back-up relay.
If 24 VAC is measured:
Check for 24 VAC at
TP6
.
Replace Interface board if defective.
DISPLAY LOCKS UP
PROBABLE CAUSE
CORRECTIVE ACTION
“Help” in display
Check probe for proper resistance.
Check that probe connections are secure.
Push “TEMP” button on control board and check to see if temperature
rapidly descends. If temp does descend rapidly, replace ribbon cable.
Check to see that contactors/relays are not stuck in the closed
position.
Replace contactor if defective.
Check for foreign objects keeping contactor closed.
“88888” stuck in display
Check for stuck button by pressing any button.
If computer beeps or chirps:
Check control panel transformer (12 VAC) for proper operation.
Check
TP1
for at least 10.5 VAC.
Check
TP2
for at least 4.99 VDC.
Check
TP3
for at least 4.97 VDC.
If computer does not beep or chirp:
Check each button for movement.
Check that panel label has not been damaged in any way.
Replace button if defective.
Replace panel label.
Display has shelf “A”
Read Programming Codes.
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...