
- 15 -
temperature sensor it may be disconnected.
E7
Selection switch error
◎
Controller board error
F0
Start-up power error
◎
Turn off water then start-up power
F1
Hi Limit thermostat
open
◎
Controller board error
F2
Gas Valve driver circuit
error
◎
Controller board error
F3
The power of Gas
Valve error
◎
Controller board error
F4
Main Valve control
circuit error
◎
Controller board error
F5
Proportional Valve
driver circuit error
◎
Controller board error
F6
AD converter error
◎
Controller board error
F7
Setting Switch error
◎
Controller board error