Repair
Repair Overtemperature Switch
1. Perform
Shutdown, page 49
.
2. Wait for booster heater to cool.
3. Remove heater shroud.
4. Open the split loom about 18 in. (457 mm)
awayfrom where the overtemperature switch is
attached to the heater. Verify“J23 TCM-A/B” and
“J23 OVERTEMP-SW” cables are connected. .
See
Electrical Schematics, page 134
.
5. Disconnect overtemperature switch (358) from
splitter cable. Test across pins 1 and 3 of
connector labeled “J23 OVERTEMP-SW” with
ohmmeter.
a. If the resistance is not approximately0 ohms,
the overtemperature switch needs to be
replaced. Go to step 6.
b. If the resistance is approximately0 ohms,
test the splitter cable to ensure it is not cut or
open. Reconnect the overtemperature switch
and splitter. Disconnect the splitter from port
1 on both LPTCMs. Test from pin 1 to 3
at both “TCM-A-1 J23” and “TCM-B-1 J23”.
Resistance should be approximately0 ohms.
Note
The splitter mayhave failed if one or both
of the readings is above approximately0
ohms. If the readings is approximately
0 ohms, then there mayhave been a
bad connector/connection causing the
problem.
6. If switch fails test, remove screws. Discard failed
switch. Applya thin layer of thermal compound
110009, install new switch in same location on
housing (351), and secure with screws (361).
Reconnect cables.
Replace RTD
1. Perform
Shutdown, page 49
.
2. Wait for heater to cool.
3. Remove heater shroud.
4. B Side RTD: disconnect RTD cable “TCM-B–2
HT-RTD-B” (360) from B side LPTCM (543). See
Electrical Schematics, page 134
.
5. A side RTD:
a. Follow “J24 HT- RTD-A" RTD cable (360) and
open split loom about 18 in. (457.2 mm) away
from the heater attachment. Disconnect “J24
HT- RTD-A" and “J24 TCM-A” connectors.
See
Electrical Schematics, page 134
.
b. Visuallyinspect “J24 TCM-A” connector and
replace extension cable (58) if necessary.
Continue to next step if the extension cable
connector is not damaged.
c. Visuallyinspect “TCM-A-2 J24” connection
to A side LPTCM. Continue to next step to
replace RTD (360).
3A1706K
69
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Summary of Contents for Reactor E-30i
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