Rheem 64DV - Page 77

76 | P a g e S V C 8 2 0 ( P ) P o c k e t M a n u a l
76
Turn on all hot water fixtures to activate water control valve
(refer to 29 – ErrorCode (B) Page 56).
Explanation: Water volume control valve
malfunction.
Diagnostic Checks:
 Water volume control valve
65 – Error Code
Blower Motor
Connector Location
On Page 14
Turn Power Off, Remove & Reinsert connector C.
Remove control board bracket. (How to remove: Section 1)
Visually inspect water volume control valve for
loose or damaged connections
Reassemble & operate unit.
Does 10-Warning Code appear?
Locate MIN & MAX buttons
on upper right-hand corner of
control board.
Continue diagnostics on next
page.
YES
Blower motor needed to be
cleaned or you had a loose
connection.
Unit appears to be operating
OK.
NO
IMPORTANT: The water volume control valve will only activate IF
demand for hot water EXCEEDS the units limitations. If water flow
is within the units limitations, you will not get a voltage reading for
diagnostics.
Water volume control
valve, located to right of
blower motor, connected
directly to water inlet.