Section 4 - Troubleshooting Charts; Voltage And Continuity - Dacor EORS127 Service Manual

Section 4 – Troubleshooting Charts

Voltage and Continuity

Symptoms
No clock display
No elements cycling in
ALL modes
All the voltage test points will be at the relay board.
While power is on check the following Voltages:
1) P3 pin 4 - P3 pin 5 = 5 VDC (check both relay and display board).
2) P3 pin 6 - P3 pin 7 = 12 VDC (check both relay and display board)
If one the above voltages not present check connection to P3 connector.
If cable is properly connected, then replace it.
3) NEUTRAL (terminal block) - L1 (terminal block) = 120 VAC.
4) NEUT (P6) - L1C (P4) = 120 VAC.
5) White external wire to black external wire = 120 VAC.
If one the above voltages is not present, turn OFF oven and do continuity
check:
6) L1 (terminal block) to L1C.
7) NEUTRAL (terminal block) to NEUT (P4).
8) Black external oven wire to L1(terminal block)
9) White external oven wire to N (terminal block)
Establish proper connection if disconnected or miss-wired. Also check the
household circuit breaker to see if it is in the OFF position or has been
tripped.
10) If all of the above connections are good, but problem persists, replace the
relay board.
11) If by replacing relay board problem is not fixed, replace the display board
as last resort.
1) Make sure that the display lights up. If not, see No Clock Display above.
2) Turn OFF power, check continuity of Hi-Limit Switch. If no continuity,
press Hi-Limit reset button. Turn ON power and rerun different modes to
test if all elements turn ON properly.
3) If step 2 does not solve the problem, while oven power is OFF, check to
see if oven's red, black, white and green wires are connected to the
corresponding red, black whites and green wires of the source. Make
sure they are not miss-wired or disconnected. Also check corresponding
red, black and white power source cable wire has continuity to
corresponding red, white and black terminals on the terminal block. The
green wire of the oven is connected to chassis. Check continuity of the
following wires on the faulty cell:
4) Check upper or single elements, L1 to L1A.
5) Check lower elements, L1 to L1B.
6) Check upper or single elements, L2 to K7 L2 IN1.
7) Check lower elements, L2 to K4 L2 IN2.
If no continuity, tighten terminal block, change wire or wire terminals.
Turn ON Power. Check the following...
8) L1 - L2 = 240 VAC.
9) L1A - L2 = 240 VAC (Upper/Single elements). Conitniued...
Section 4 – Troubleshooting Charts
Page 7