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Temperature Control Diagnostic Codes
312066Z 9
4. Remove connector B from temperature control mod-
ule, and check continuity of overtemperature
switches A and B, thermocouples A and B, or FTS
by measuring resistance across the pins on the plug
end; see T
ABLE
1.
5. Verify fluid temperature, using an external tempera-
ture sensing device.
• If temperature
is
too high (sensor reading is
229°F [109°C] or above):
6. Check if thermocouples A and B are damaged, or
not contacting the heater element, page 42.
7. To test that temperature control module turns off
when equipment reaches temperature setpoint:
a. Set temperature setpoints far below displayed
temperature.
b. Turn zone on. If temperature rises steadily,
power board is failing.
c. Verify by swapping with another power module.
See Replacing Temperature Control Assem-
bly Modules, page 38.
d. If the swapped module does not fix the problem,
the power module is not the cause.
8. Verify continuity of heater elements with an ohmme-
ter, see page 40.
E02: High zone current
1. Turn main power OFF .
2. Relieve pressure, page 23.
3. Disconnect hose connector (D) at Reactor.
4. Using an ohmmeter, check between the two termi-
nals of the connector (D). There should be no conti-
nuity.
5. Exchange zone module with another one. Turn
zone on and check for error. If error disappears,
replace faulty module.
For hose zone:
If error still occurs, perform Trans-
former Primary Check and Transformer Secondary
Check starting on page 45.
Before doing the following checks, note which zone
(A, B, FTS, or all) has high fluid temperature.
Table 1: Sensor Connector Continuity Checks
Pins Description Reading
1 & 2 OT switch A nearly 0 ohms
3 & 4 OT switch B nearly 0 ohms
5 & 6 Thermocouple A 4-6 ohms
8 & 9 Thermocouple B 4-6 ohms
11 & 12 FTS approximately 35
ohms per 50 ft (15.2
m) of hose, plus
approximately 10
ohms for FTS
10 & 12 FTS open
Disconnect whip hose.
When there is a a high current error, the LED on
that zone’s module will turn red while the error is
displayed.