Rheem 64DV - Diagnostic Points (Voltage & Resistance Readings)

16 | P a g e S V C 8 2 0 ( P ) P o c k e t M a n u a l
16
Diagnostic Points on Control Board
Connection
Wire
Color
Normal Value
What are
you
checking?
I – J
W1-BK2
AC108-132V
Do you have
power to the
control
board?
U
W1-W2
50KΩ-500KΩ
Is the
overheat film
wrap OK?
S
BR1-BK2
DC 2-5V
(Pulse)
More than 1,310
pulses/minute
Does the
water flow
sensor send
a pulse?
(Only when
water is
flowing thru
the unit)
S
R3-BK2
DC 11-17V
Does the
water flow
sensor have
voltage?
(Power ON;
no water
flow)