Fisher & Paykel OB24SDPX1, Service Manual

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Self-Clean (Pyrolytic) Function
When the self-clean function is selected on the mode selector, the Electronic Programmer
(EL1000) will trigger the following.
•
Internal cavity temperature confirmed by ST1 probe.
•
Door closed status confirmed by ST3 microswitch and door lock light is illuminated.
•
P0-00 displayed on LCD.
•
P1-30 displayed on PCB after key 3 verification (Max P3-00 available).
•
Door lock / unlock relay 3 operated (term 3 – 4) locking oven door latch (<30 seconds).
•
Cooling fan triggered by Triac 1 (old version programmer) or relay 4 (new version
programmer).
•
Thermostat relay 1 operated and thermostat contacts closed.
•
Time to run verified on PCB: P3-00, P2-30, etc.
•
P0-00 and auto symbol flash at end of cycle.
•
Door lock neon illuminated within 30 seconds of relay 3 operation.
Power is now supplied via the safety thermal overload to the various switch terminal configurations
on the mode selector and on to the grill element and external bottom oven element.
The oven cavity is heated up to the maximum self-clean temperature of 914
0
F and is controlled by
the ST1 probe and thermostat relay 1.
The oven door will be remained locked until the self-clean cycle has finished and the cavity
temperature has dropped to below 563
0
F. Above this temperature, the display will show “DoLo”.
Triac 1 (old version programmer) or relay 4 (new version programmer) maintains the cooling fan
operation until the selector switch is turned to the “Off” ,”Light” or “Defrost” position and the inside
oven cavity drops below 212
0
F.
Note: Full user set up details and customer message readings for the normal self-clean function
can be found in the User Operating Instructions.
5.1.1.2 Electronic Programmer Testing
Quick Test
A simple test to verify the correct sequence of programmes are being registered by the PCB is to
turn the selector switch through all settings and compare the digital readout with the following:
Setting Programme Display Readout
0 Off Time of Day (hh:mm)
1 Lamp Time of Day (hh:mm)
2 Defrost dEF
3 Convection Bake Oven Ambient Temperature
4 Bake Oven Ambient Temperature
5 Double Grill Oven Ambient Temperature
6 Grill Oven Ambient Temperature
7 Fan Grill Oven Ambient Temperature
8 Self-Clean P1-30 (Ph:mm)
By referring to the test procedure for the control switch, it is possible to make further checks to
verify the resistance being read by the electronic programmer from the control switch, however the
above chart should be sufficient in most cases.