Primus D11, Service Manual

Page: 51 / 160

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Section 7 Electronic Control Troubleshooting
62. CONTROL DISPLAY – NO VISIBLE DISPLAY – POWER ON
T025D
Is there voltage across
H4-2 & H4-5 on the
EDC control?
Replace EDC
Control.
Is there power supplied
to the unit?
NO
Is there voltage to input
of primary fuses?
Is there voltage to
output side of the
primary fuses?
Is there voltage across
terminals 1 & 2 of
transformer primary?
Plug unit in and run
it.
Correct wiring
between primary
fuses and power
supply.
Replace primary
fuse(s).
Correct wiring
between primary
fuse and
transformer.
Is there voltage across
terminals 2 & 3 of
transformer
secondary?
Replace
transformer.
Is there voltage at
the input of the
secondary fuse?
Is there voltage to
output side of
secondary fuse?
Correct wiring
between secondary
fuse and
transformer.
Replace secondary
fuse.
Correct wiring
between H4-2 and
secondary fuse.
YES
NO
NO
NO
NO
NO
NO
NO YES
YES
YES
YES
YES
YES
YES
Single and stacked
units. Gas and electric
heat. Single and three
phase supply.
T025D