Repair
32 3A1570L
Overtemperature Switch
1. Turn main power OFF . Disconnect power
supply.
2. Relieve pressure, page 14.
3. Wait for heaters to cool.
4. Remove heater shroud.
5. Disconnect one leadwire from over-temperature
switch (359), F
IG. 8. Test across switch with ohm-
meter. Resistance must be approximately 0 ohms.
6. If switch fails test, remove wires and screws. Dis-
card failed switch. Apply thermal compound
110009, install new switch in same location on
housing (351), and secure with screws (311).
Reconnect wires.
If wires need replacement, disconnect temperature con-
trol module. See Table 2, page 27 and F
IG. 6, page 27
Heated Hose
Refer to the heated hose manual for hose replacement
parts.
Check Hose Power Connectors
1. Turn main power OFF . Disconnect power
supply.
2. Relieve pressure, page 14.
Whip hose must be connected.
3. Disconnect Reactor power harness (PH) from hose
termination box terminal block (TB).
4. For Series A only: Disconnect hose connector (D)
at Reactor.
5. Using an ohmmeter, check between the two
terminals of the connector (TEST). There should be
continuity.
6. If hose fails test, retest at each length of hose,
including whip hose, until failure is isolated.
Check FTS Cables
1. Turn main power OFF . Disconnect power
supply.
2. Relieve pressure, page 14.
3. Disconnect FTS cable (F) at Reactor, F
IG. 9.
4. Test with ohmmeter between pins of cable connec-
tor.
5. If cable fails test, retest at FTS, page 33.
Read Warnings on page 5. Wait for heater to cool
before repairing.
FIG. 9. Heated Hose
Pins Result
1 to 2 approximately 35 ohms per 50 ft (15.2 m) of hose,
plus approximately 10 ohms for FTS
1 to 3 infinity
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