Fisher & Paykel Titan AeroTech OD302-B, Руководство по обслуживанию

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Service Manual 599337A: 302B Series Titan Oven July 2006
30
5. Fault Diagnostics
5.1 SYMPTOM: Oven electrical components are unresponsive
POSSIBLE CAUSES:
Clock not set after powering up
Blown fuse
Faulty supply wiring or connections
Faulty power transformer
Tripped microtemp limiter
Faulty power module
DIAGNOSIS:
If the clock colon : is flashing, push the clock button to set the time.
Check the circuit breaker or fuse at the switchboard.
Test for the correct supply voltage at the mains terminal block.
120 volts.
Check the power transformer by testing for 12
VAC
on the 2-way connector into the
power module (refer to Technical Overview Section 2.25). Replace if there is no
12
VAC
.
Check for a tripped microtemp limiter and replace if tripped. Check the other thermal
limiters and trace the likely cause for tripping. (refer to Section 5.24)
Check for a blown power module fuse by testing for 12
VDC
between pins 1 and 6 of
the 12-way clock connector on the power module. (refer to Technical Overview
Section 2.25)
If there is no 12
VAC
then the fuse has blown. Replace the power module. (refer to
Servicing Instructions Section 7.9)
Tracing the cause of a blown power module fuse:
Check the resistance to earth of the lamp wiring and replace if there is a short circuit.
(refer to Servicing Instructions Section 7.14)
Check the power transformer by testing for 12
VAC
on the 2-way connector into the
power module. Replace the transformer if the voltage exceeds 12
VAC
.