Rheem 64DV - Page 88

S V C 8 2 0 ( P ) P o c k e t M a n u a l P a g e 87
87
Blower Motor Diagnostics:
Outdoor Models ONLY
Upper-Right Hand Corner of Control Board
Test DC voltage across
Blue and White wires
on connector G:
144 – 192 DC Volts
YES
Remove & reinsert G.
Operate unit again.
IF Code 79 appears:
Replace control board.
NO
Hold down MAX button.
Test DC voltage across
Blue & Red wires
on connector G:
12 – 18 DC Volts
YES
Remove & reinsert G.
Operate unit again.
IF Code 79 appears:
Replace control board.
NO
Hold down MAX button.
Test DC voltage across
Blue & Yellow wires
on connector G:
4 – 10 DC Volts
YES
Remove & reinsert G.
Operate unit again.
IF Code 79 appears:
Replace blower motor.
NO
Operate Unite.
If 79 – Error Code appears:
Replace control board.
IMPORTANT: While performing
voltage checks, DO NOT touch
multimeter leads across YELLOW &
RED wires. Damage may occur to
blower motor and control board.
Connector Location
On Page 14
MIN
MAX