Paloma PH2-20R DVSN, Engineering Handbook

Page: 88 / 172

88 | Page SVC 820 Tankless Gas Trouble Shooting Manual
88
80 – Error Code
Explanation: Gas Control Valve malfunction. The unit
detects the presence of flame when the demand for hot
water is terminated and burner is OFF. This error code will
only occur at time of shut down.
Diagnostic Checks:
•
Flame Rod(s)
•
Gas Control Valve
FLAME ROD(s) & GAS CONTROL VALVE DIAGNOSTICS:
Remove and reinsert terminals on Flame Rod(s)*.
Attempt to operate unit again. IF 80 Error Code does
NOT display, unit had a loose connection.
Turn power OFF. Remove and reinsert white
connector “M” and blue connector “T” on Control
Board.
1 2
3
Sight Glass
Gas Control Valve
Visually inspect Gas Control Valve wiring
harnesses for loose connection or
damaged wiring. Gas Control Valve is
located on lower right side of unit. Locate
Sight Glass.
Flame Rod(s)*
*Indoor Units ONLY:
2 Flame Rods