Rheem 64DV - Page 70

S V C 8 2 0 ( P ) P o c k e t M a n u a l P a g e 69
69
In 10 second intervals, cycle
unit 3 times by turning unit:
ON-OFF; ON-OFF; ON-OFF
Does 0Y status in
maintenance mode indicate
presence of flame while unit
has been off >5 seconds?
YES
Follow maintenance mode
instructions at bottom of
page & continue to
diagnostics on next page.
NO
Disconnect wires at flame
rod(s). While viewing burner
chamber through sight glass:
In 10 second intervals, cycle
unit 3 times by turning unit:
ON-OFF; ON-OFF; ON-OFF
Does 0Y status in
maintenance mode indicate
presence of flame while unit
has been off >5 seconds?
YES
Clean flame rod(s).
IF 51 – Error Code appears
after cleaning flame rod(s):
Replace flame rod(s).
Replace control board.
On remote control, go to maintenance mode 0Y table.
For maintenance mode instructions go to page 21.
All maintenance mode ‘0Y’ readings should be done
immediately after turning the unit OFF.
IF Flame Rod(s) is detecting flame, maintenance mode will
display:
Indoor Units: 05
Outdoor Units: 01