Dacor MORS136, Service Manual

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Dacor Renaissance Wall Oven Service Guide
Page 10
Symptoms All the voltage test points will be at the relay board.
5) If above mentioned terminals do not read 240 VAC when suggested
mode is running and the oven started cold then the convectionl relay is
not cycling or is damaged. Replace the relay board. Upon replacement
do 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 convection, K7 L2 OUT1 - CONV 1(P19) =
approximately 25 ohms.
8) Check lower convection, K4 L2 OUT2 - CONV 2(P24) = approximately
25 ohms.
9) If resistance is high, check for continuity of the wires as follows:
10) Check upper/single convection wire, CONV 1 (P14) to upper broil
element terminal
11) Check lower convection wire, CONV 2 (P5) to lower broil element
terminal
12) Check upper/single convection wire, K7 L2 OUT1 to the other upper
convection element terminal
13) Check lower convection wire, K4 L2 OUT2 to the other lower convection
element terminal
14) If continuity is good then make sure convection element connector is
connected to the convection element terminal. If connection is good, then
disconnect the convection connections and directly measure the
convection element resistance. If it is not near 25 ohms replace
convection element.
Convection Fan does not
run during Preheat, Conv
Bake, Conv Broil, Conv
Roast.
1) Start with a cold oven and run any modes that will turn on the Convection
fan e.g. Preheat, Pure Convection, Convection Bake, etc. If the fan does
not run check across the following test points on faulty cell:
2) Check upper/single convection fan, Neutral to P11 pin 3 = 120 VAC
upper/single convection fan.
3) Check lower convection fan, Neutral to P11 pin 7 = 120VAC (lower
convection fan).
4) If no voltage measured or convection fan not running, turn OFF power
and check continuity on following wires:
5) Neutral to NEUT (P6). If no continuity, change wire or wire terminal or
tighten neutral connection on the terminal block.
6) If there is continuity, check resistance on these test points:
7) Check upper/single convection fan, neutral - P11 pin 3 = approximately
13 ohm.
8) Check lower convection fan, neutral - P11 pin 7 = approximately 13
ohms.
9) If resistance is high, check continuity on the following wires:
10) Check upper/single convection fan, P11 pin 3 to one terminal of the upper
convection fan.
11) Check lower convection fan, P11 pin 7 to one terminal of the lower
convection fan. Also check if the other end of the convection fan is
connected to neutral. If connected change the wire or connector or the
terminal if no continuity present. Continued…
Convection element only
is not cycling during
preheat and Pure
Convection (cont.)
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