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

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