Dacor EORD227, Service Manual

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Section 4 – Troubleshooting Charts
Page 9
Symptoms All the voltage test points will be at the relay board.
15) Upon replacement of wires, connectors, relay board or display board,
rerun the above test to confirm problem is corrected.
Broil element only is not
cycling during Preheat,
Bake, Conv Bake, Conv
Roast, Broil, Conv Broil,
and Self Clean
1) Make sure that only the broil element is not cycling. If the other elements
are not cycling, see No elements cycling in ALL modes section.
2) Start with a cold oven and run BROIL or CONV BROIL on the faulty oven
cell. Check these test points using voltmeter on the faulty cell. The
voltages should follow the appropriate broil cycling pattern:
3) Check upper/single broil, K7 L2 OUT1 – BROIL 1 (P15) = 240 VAC.
4) Check lower broil, K4 L2 OUT2 – BROIL 2 (P18) = 240 VAC.
5) If above terminals do not read 240 VAC when suggested mode is
running and the oven started cold, then the broil relay is not cycling or is
damaged. Replace relay board. Upon replacement repeat the same test
again.
6) If there is activity then turn OFF the power and check the broil element
resistance on the following terminals:
7) Check upper/single broil, K7 L2 OUT1 - BROIL 1 (P19) = approximately
18 ohms.
8) Check lower broil, K4 L2 OUT2 - BROIL 2 (P24) = approximately 18
ohms.
9) If resistance is high, check for continuity of the wires of the faulty cell:
10) Check upper/single broil wire, BROIL 1 (P15) to upper broil element
terminal (upper/single).
11) Check lower broil wire, BROIL 2 (P18) to lower broil element terminal
12) To check upper/single broil, K7 L2 OUT1 to the other upper broil element
terminal (upper/single).
13) To check lower broil, K4 L2 OUT2 to the other lower broil element
terminal.
14) If continuity is good then make sure the broil element connector is
connected to the broil element terminal. If connection is good, then
disconnect the broil connections and directly measure the broil element
resistance and if it not near 18 ohms replace broil element.
15) Upon replacement of wires, connectors, relay board or display board,
rerun the above test to confirm problem is corrected.
Convection element only
is not cycling during
preheat and Pure
Convection
1) Make sure that only the convection element is not cycling. If the other
elements are not cycling, see No elements cycling in ALL modes
section.
2) Start with a cold oven and run PURE CONVECTION with target of 200
degrees F on the faulty oven cell. Make sure that it does not go to
Preheat and check these test points using voltmeter and should follow
the Cycling Pattern:
3) Check upper/single convection, K7 L2 OUT1 – CONV 1 (P14) = 240
VAC.
4) Check lower convection, K4 L2 OUT2 – CONV 2 (P5) = 240 VAC.
Continued….
Bake element only is not
cycling during preheat,
bake, conv bake, conv
roast, self clean, HOLD
(cont.)
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