Error Code - Paloma PH2-20R OFN Engineering Handbook

82 | Page
72 – Error Code
Explanation: Flame Rod(s) malfunction. Flame Rod(s) is
detecting the presence of flame BEFORE igniter is
activated.
FLAME ROD(s) & GAS CONTROL VALVE DIAGNOSTICS:
1
Turn power OFF. Remove and reinsert white
connector "M" and blue connector "T" on Control
3
82
SVC 820 Tankless Gas Trouble Shooting Manual
Board.
Sight Glass
Gas Control Valve
Diagnostic Checks:
•
Flame Rod(s)
•
Gas Control Valve
Remove and reinsert terminals on Flame Rod(s)*.
Attempt to operate unit again. IF 72 Error Code does
NOT display, unit had a loose connection.
*Indoor Units ONLY:
2 Flame Rods
Visually inspect Gas Control Valve
wiring harnesses for loose
connections or damaged wiring.
Gas Control Valve is located on
lower right side of unit.
Locate Sight Glass.
2
Flame Rod(s)*