Bradford White UPDX2-75T6FRN - Manual (Page 34)

Page 34
UPDX Series
WARNING
115 volt potential exposure. Use caution
making voltage checks to avoid personal injury.
Disconnect cord set as
shown in photo 32.
LED status
None, Control LED not
on or flashing.
Step 1. Verify 115VAC and proper polarity at
wall outlet.
Step 2. With unit plugged in and gas control power
switch to the “ON” position verify LED
status.
LED status
Short flash, once every
four seconds.
LED status
“Heartbeat”, alternates
bright/dim.
LED status
Various flashing error
codes.
Waiting for
call for heat.
Thermostat calling
for heat.
Verify error code as
listed on page 12.
Using a volt meter set to
volts AC, is there 115VAC
across terminals shown
in photo 33?
N
Y
32 33
Reconnect cord set
shown in photo 32.
Repair damage.
Check for damage to AC
supply power cord.
Y
N
Replace Blower.
36
Check for 115VAC between black & white wires.
-NOTE-
Electronic meter probes required. Use care not to
damage connector during this check.
Wire sheath pulled back to
identify wire colors
35
Wire harness
Disconnect wire harness
from gas control
(see photo 35).
Locate black & white wires at connector, It
may be necessary to pull back wire sheath
to identify wire colors.
(see photo 36).
Y
N
Replace gas
control.
Is there 115VAC across
black & white wires as
shown in photo 36?
Call for technical
support.
Is there 115VAC across
terminals shown in
photo 34?
N
Y
Incorrect supply
voltage polarity.
34
115 VAC Circuit Trace
Gas Control shown in the
“ON” position
UPDX SERVICE PROCEDURE XI
115 VAC Trace
34