Graco 26R310, Repair And Parts Manual

Page: 41 / 82

Repair
3A8501A 41
Calibration Procedure
NOTE: The Reactor and heated hose must be at the
same ambient temperature to get the most accurate
calibration. Perform calibration at the beginning of the
day before any material has been heated.
See your Reactor 3 operation manual for instructions
on how to perform the calibration procedure.
Transformer Check
See Electrical Schematics on page 69.
1. Follow Shutdown on page 20.
2. Check the transformer primary wires:
a. Open circuit breaker CB3 to turn the color
indicator on the circuit breaker green.
b. Use an ohmmeter to test for continuity between
the primary transformer wires in CB3-2 and
CB3-4 (there should be continuity).
c. Close circuit breaker CB3 after the test.
3. Check the transformer secondary wires:
a. Disconnect the 7-pin green connector (PI-TCM)
from the TCM.
b. Use and ohmmeter to test for continuity
between terminals 5 and 6 on the TCM 7-pin
green connector. There should be continuity. If
there is no continuity, check the transformer.
c. Reconnect the 7-pin green connector to the
TCM.
4. Check the transformer:
a. Apply incoming power to the system.
b. To verify voltage on the secondary leads of the
transformer, measure between terminals 5 and
6 on the TCM 7-pin green connector. Verify
voltage is approximately 90 VAC (E-30 and
E-XP2) or 60 VAC (E-20 and E-XP1) for 240
VAC input.
c. See the diagnostic Run Screen on the ADM.
The diagnostic run screen displays the
incoming voltage to the TCM under “Voltages”.
d. If the hose current is zero (0) when heating the
hose (see “Currents” and “Hose” on the
diagnostic screen). Make sure breaker CB4 is
not tripped.
NOTICE
To prevent damage to the heated hose, a hose
calibration is required if any of the following conditions
are true:
• The hose has never been calibrated before
• A section of hose has been replaced
• A section of hose has been added
• A section of hose has been removed.