5.4.3
MICROWAVE
HEATING.
Place a graduate of about 250ml water on the turntable tray.
Close
the
door,
power set
high,
time set 4 minutes
(To those 700W microwave oven) to
mąkę
the oven operating in normal. When the
beli
of the
timer
rings, open
the oven
door,
the water should
have
boiled.
If
it have not been boiled yet, but is
very
hot,
check
whether
the
voltage is less than 220V. If the voltage
below
220V but the water can be boiled
after
a little
morę
time beating, it
is normal.
5.4.4
MiCROWAYE
DEFROST:
Place a graduate of about 200ml water on the turntable
glass
tray of the
oven,
power set middle, time set 4
minutes to
mąkę
the oven operating in normal. When the
beli
of the time
ring,
open the door. It
would
be normal if
the water is lukewarm.
6.1
IMPORTAMI
THINGS
TO DO
PRIOR
TO CRITICAL PARTS
SERYICING:
The following instructions
arę
CRITICAL to the owner's safety. Be
surę
to follow
all
the instructions. Contact the
manufacturer or
distributor
if you have any question.
1. If the oven is operative prior to
servicing,
a Microwave Leakage Test (a. k. a. Microwave Emission Check)
should be
performed
prior to
servicing
the oven Refer to Section 7.3, Microwave Leakage Test. For the
detailed check procedures.
2. In the event that any microwave oven found to have microwave emission level in excess of 4 mW/cm2. The
following procedures should be followed:
(1). .Inform the distributor;
importer,
or manufacturer the finding. Record it in the logbook as
well.
(2).
.Repair
the unit at no cost to the owner.
(3).
.lnvestigate
the oven and
ascertain
the cause of the excessive leakage.
(4).
.Hołd
the oven in your facility and instruct the owner not to use the
unii
until
the oven has.
3. In the event that the oven operates with the door open. The following procedures should be followed:
(1).
Tell
the user not to operate the oven.
(2).
Hołd
the oven in your facility until it is investigated and repaired.
(3). Contact the manufacturer and CDRH (FDA) immediately.
6.2 INTERLOCK
ASSEMBLY
REPLACEMENT
AND
ADJUSTWENT.
1. If you suspect defective
primary,
secondary
or monitor interlock
switches,
use your ommeter (digital or
analog type) to check the electrical continuity.
2.
Mąkę
surę
the power cord is pulled out and the high-voltage capacitor is discharged before the electrical
continuity check.
3. Set the ohmmeter to
"Low
Resistance"
rangę and connect both
leads
(alligator elips) to the switch terminals.
4. Open the door and notice the meter reading the primary or secondary interlock switch should show an
"infinite"
resistancc when the door is open. Replace it when it is defective. The monitor interlock should show
a "zero or near zero" resistance when the door is open. When the door is closed, the readings will be
opposite.
5. If the oven has been rendered inoperative due to the failure of the monitored safety (primary and
/or
secondary ) interlock(s). You should replace all of the monitored safety interlock switched and the monitor
switch.
6. Refer to Chapter 4, Sections l and X for
how
to remove and assemble the interlock and monitor switches.
7. Always refer to Section 0.4 for adequate wiring diagram. Monitor interlock
must
always be installed. Repeat
Step 6.2.4 to check electrical continuity.
8.
Perform
required checks and tests as described in Chapter 7 before releasing the oven to the owner.
21
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