RE220002 Rev. 6
18
Test Procedures
High voltages are present during the cook cycle.
Extreme caution should be observed at all times.
Before touching any oven components or wiring,
always unplug the oven from its power source and discharge the
capacitor by shorting across the capacitor terminals with an insulated handle screwdriver.
DANGER
!
Holding Relay Test Models
VEND-10 .F, .G, .H, .J, VEND-10, and VEND-11
1. Disconnect power to oven, and remove but do not
disconnect the control panel assembly. Lower the
back panel to the service position.
2. Perform test set-ups as indicated on the Test Chart
below.
NOTE: If necessary, remove the component module
panel assembly to connect test leads. Replace
the module assembly prior to performing all tests
except the first two resistance checks.
TEST SET-UP
TERMINAL
TEST
POINT
NORMAL
READING
CORRECTIVE
ACTION
Disconnect power.
Remove harness
leads from relay
terminals 5 & 6.
5 to 6
250 to 350
ohms
Replace the
relay and
retest.
Reconnect harness
leads to terminals 5
& 6. Remove
harness leads from
terminals 1 &3, and
insulate to prevent
electrical short.
1 to 3
Infinite
ohms
Replace relay
and retest.
Reconnect power.
Program oven for
15 seconds and put
oven into a COOK
cycle.
5 to 6
22 Volts
DC
Replace the
controller and
retest
Holding Relay
Triac Module Test
1. Unplug the oven power cord, lower the back panel
and
discharge the capacitor(s). On FS14, remove
the left magnetron inlet duct.
2.
COMPLETELY REMOVE THE HIGH VOLTAGE
LEAD that connects the capacitor to the transformer
high voltage terminal (marked "HI" or "LO"). On the
FS14EVP also remove the lead between the second
capacitor and high voltage transformer terminal
(marked "HI" or "LO").
WARNING
!
High voltages are present at the high voltage
secondary terminals during a cook cycle.
3. With a voltmeter capable of measuring 250 VAC,
attach the meter leads to triac terminal MT1 (WHT)
and MT2 (RED). NOTE: Triac harness leads
remain connected.
WARNING
!
Do not touch any oven components or wiring during
oven operation. Attach meter leads with alligator
clips when making operational tests.
4. Perform the following test; measure and record the
voltage indicated on the meter.
Test Set Up
Set the VEND10 oven to operate on defrost for
one minute. Set the FS10 or FS14 oven to
operate at 50% power level for one minute.
Normal Output Voltage
On VEND10 and FS10 ovens voltage alternates
from 120 VAC to less than 5 VAC. On FS14
ovens alternates from 208/240 volts to less than
5 VAC. FS10 and FS14 alternates approximately
every 6 seconds, VEND10 alternation will vary.
Corrective Action—If abnormal output voltage is
measured.
If controller tests check okay, replace the triac
module and retest.
MT2
MT1
GA TE
Triac
This triac is used in
models with P130210_M
series
Disconnect wires to triac.
Measure resistance from:
MT1 to MT2
MT1 to Gate
MT2 to Gate
All terminals to ground
Caution - Do not operate oven with
wire to terminal MT2 removed.
Infinite
Approximately 40
Ω
or more
Infinite
Infinite