Graco Reactor E-20 259034 [11/76] E02 high zone current

Graco Reactor E-20 AH9030 [11/76] E02 high zone current
Temperature Control Diagnostic Codes
312066ZAF 11
3. Check connections between the temperature
control board and overtemperature switches A and
B (308), and between temperature control board
and thermocouples A and B (310) or FTS (21)
[depending on which zone is displaying E01]. See
Table 5, page 39. Ensure that all wires are securely
connected to connector B.
4. Remove connector B from temperature control
module, 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.
NOTE: Before doing the following checks, note which
zone (A, B, FTS, or all) has high fluid temperature.
5. Verify fluid temperature, using an external
temperature 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 43.
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
Assembly Modules, page 40.
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
ohmmeter, see page 41.
E02: High zone current
1. Turn main power OFF .
2. Perform the Pressure Relief Procedure, page 25.
NOTE: Disconnect whip hose.
3. Disconnect hose connector (D) at Reactor.
4. Using an ohmmeter, check between the two
terminals of the connector (D). There should be no
continuity.
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
Transformer Primary Check and Transformer
Secondary Check starting on page 47.
NOTE: When there is a a high current error, the LED on
that zone’s module will turn red while the error is
displayed.
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

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