Dacor MORS136, Service Manual

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Dacor Renaissance Wall Oven Service Guide
Page 12
Symptoms All the voltage test points will be at the relay board.
7) If there is continuity, check resistance on these test points:
8) Check upper/single latch motor, Neutral - P11 Pin 1 = approximately 18
ohms.
9) Check lower latch motor, Neutral - P11 Pin 9 = approximately 18 ohms.
10) If resistance is high, check continuity on the following wires:
11) Check upper/single latch motor, P11 Pin 1 to one terminal of the upper
cooling fan.
12) Check lower latch motor, P11 Pin 9 to one terminal of the lower cooling
fan. Also check if the other end of the latch motor harness is connected to
Neutral. If so, change the wire or connector or the terminal if no
continuity.
13) If connection is good, disconnect the latch motor and directly measure the
resistance across the terminals. It should be approximately 18 ohms.
14) If Latch Motor resistance is OK and connections are good, then the
cooling fan relay is bad. Replace the relay board. Upon replacement do
the same test again.
15) If problem still persists, replace the display board as last resort.
No oven light only
1) Turn light ON and check voltage on the following test points:
2) Connector P11 wire # 4 to Neutral power output to light transformer =
120VAC. If no voltage replace relay board.
3) If voltage is present, check output voltage of light transformer. If no
voltage, replace light transformer.
4) If transformer voltage OK, Check wire 8 & 10 right oven light (12V) and 6
& 8 wire left oven light (12V).
No heat in any cooking
mode
1) Check across test points:
2) Check house supply into relay board at L1C to L2 IN = 240 VAC
3) Check for open HTC hi-temp cutout located off to the right of the self
clean latch.
Oven sensor failure
Failure Code U30/31
1) Check across test points:
2) Pull connector P5 off of the back side of the ERC Control/Clock Check
across wire 1 & 3 (White Wire) Should read between 1050 to 1100
OHM`S. Check each wire to ground for pinch or shorted wire. Check two
white for good connection into the P5 connector.
Latch switch circuit
1) Check across test points.
2) Pull connector P5 off the back side of the ERC Control it is a 12 pin
connector. In connection 9 Black /11Blue/Yellow 12. P9 is the Com. on
both latch switches. With the latch in the OPEN position there should be
continuity between connection 9 Black and 12 yellow.
3) Latch in the lock position continuity is between connection Black 9 and
Blue #11.
Latch motor not running
during Self Clean
(cont.)
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