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Page SVC 820 Tankless Gas Trouble Shooting Manual
82
72 – Error Code
Explanation:
Flame Rod(s) malfunction. Flame Rod(s) is
detecting the presence of flame BEFORE igniter is
activated.
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 72 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
Flame Rod(s)*
*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.
Sight Glass
Gas Control Valve
3
Summary of Contents for PH2-20R DVSN
Page 158: ... 158 Schematic Disassembly PH2 20RDVS PH2 25RDVS PH2 28RDVS ...
Page 159: ... 159 Schematic Disassembly PH2 20RDVS PH2 25RDVS PH2 28RDVS ...
Page 160: ... 160 Schematic Disassembly PH2 20RDVS PH2 25RDVS PH2 28RDVS ...
Page 162: ... 162 Schematic Disassembly PH2 20ROF PH2 25ROF PH2 28ROF ...
Page 163: ... 163 Schematic Disassembly PH2 20ROF PH2 25ROF PH2 28ROF ...
Page 164: ... 164 Schematic Disassembly PH2 20ROF PH2 25ROF PH2 28ROF ...
Page 166: ...Schematic Disassembly PHH 32RDV PHH 25RDV 166 ...
Page 167: ...Schematic Disassembly PHH 32RDV PHH 25RDV 167 ...
Page 169: ... 169 Schematic Disassembly PHH 32ROF PHH 25ROF ...