Paloma PH2-20R OFN Engineering Handbook page 45

SVC 820-Tankless Gas Trouble Shooting Manual Page | 45
FLAME ROD(s) Diagnostic Chart
Attempt to operate unit again.
Cycle unit ON and check AC Volts at
Is the AC voltage
IF the unit malfunctions due to an Error
white "M" & blue "T" connectors:
OK?
NO
Code 12:
1 – 100 AC VOLTS
Replace Control Board
YES
Cycle unit ON; while in Maintenance Mode check
Flame Rod(s) status under table 0Y. IF detecting
flame, Maintenance Mode will display:
Indoor Models: 05
Outdoor Models: 01
Remove and clean Flame Rod(s).
Attempt to operate unit again.
Is Flame Rod(s)
IF Flame Rod(s) still does not detect flame:
detecting flame?
NO
Replace Flame Rod(s).
YES
Attempt to operate unit again. IF the unit
malfunctions due to an Error Code 12:
Flame Rods(s) are 'OK'
*CHECK: GAS, VENTING, & GROUND*
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