Paloma PH2-20R DVSN, Engineering Handbook

Page: 31 / 172

SVC 820-Tankless Gas Trouble Shooting Manual Page | 31
31
BLOWER MOTOR
Diagnostic Chart
YES NO
NO
YES
YES
NO
Test DC voltage across black and red
wires on connector “G”:
144 – 192 DC VOLTS
Is the DC voltage
OK?
Remove and reinsert connector “G” at
Control Board.
Attempt to operate unit again.
IF unit continues to display Error Code 10:
Replace Control Board
Is the DC voltage
OK?
Press and hold down “MAX” button on Control Board
to activate the Blower Motor. While Blower Motor is
running, test DC voltage across black and white wires
on connector “G”:
12 – 18 DC VOLTS
Press and hold down “MAX” button on Control Board
to activate the blower motor. While blower is
running, test DC voltage across black and blue wires
on connector “G”:
4 – 10 DC VOLTS
Remove and reinsert connector “G” at
Control Board.
Attempt to operate unit again.
IF unit continues to display Error Code 10:
Replace Control Board
Is the DC voltage
OK?
Replace Blower Motor
Attempt to operate unit again. If unit
continues to display Warning Code 10:
Control Board and Blower Motor are ‘OK’:
CHECK VENTING & GAS SUPPLY