Transformer Primary Check; Transformer Secondary Check - Graco Reactor 2 H-30 Repair Parts

Transformer Transformer Primary Transformer Primary Check Primary
See Electrical Schematics, page
1. Check wires and transformer:
a. See Shutdown, page
b. Shut off CB15.
c. Use an ohmmeter to test for continuity
between terminals 2 and 4 of CB15. If there
is no continuity, check transformer and wiring
between CB15 and TB31 located behind the
lower cover. Go to step 2.
2. Check transformer and TB31:
a. See Shutdown, page
b. Remove the lower cover.
c. Locate the two smaller (10 AWG) wires,
labeled 1 and 2, coming out of transformer.
Trace these wires back to terminal blocks
TB31.
d. Use an ohmmeter to test for continuity
between two wires; there should be
continuity.
Transformer Transformer Secondary Transformer Secondary Check Secondary
See Electrical Schematics, page
1. Check wires and transformer:
a. See Shutdown, page
b. Disconnect 7 pin green connector from TCM.
c. Use an ohmmeter to test for continuity
between terminals 6 and 7 on the TCM 7 pin
green connector. There should be continuity.
If there is no continuity, check transformer
and wiring.
d. Leave 7 pin green connector disconnected
from TCM.
334946H
Check Check
102.
48.
48.
Check Check
102.
48.
2. Check transformer:
a. Remove lower cover.
b. Locate the two larger (6 AWG) wires, labeled
3 and 4, coming out of transformer. Trace
these wires back to TB31. Use an ohmmeter
to test for continuity between two transformer
wires in terminal block TB31; there should
be continuity.
c. Reconnect the 7 pin green connector to the
TCM.
d. Apply incoming power to system.
e. To verify voltage on the secondary leads
of the transformer, measure between the
transformer leads labeled 3 and 4 at TB31.
Verify the transformer output voltage is
approximately 37.5% of the system supply
voltage for H-30 and H-XP2 systems
or approximately 50% of system supply
voltage for H-40, H-50, and H-XP3. For
example, with a 240 VAC system supply
voltage the transformer output voltage for
an H-30 or H-XP2 would be (.375 x 240V),
or approximately 90V; for an H-40, H-50,
or H-XP3 it would be (.50 x 240V), or
approximately 120V.
f. See the Diagnostic Run Screen on the ADM.
The Diagnostic Run Screen displays the
transformer output voltage (approximately
90 or 120 VAC) under "Hose Voltage". The
diagnostic screen will show a Hose Voltage
of "0" volts if the circuit breaker has been
tripped for the incoming power to the TCM.
NOTE: The Diagnostic Run Screen is
NOTE: NOTE:
disabled by default and must be enabled
in the Setup screens. See the Operation
manual for instructions.
Repair
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