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Appendix _45
ENGLISH
TROUBLESHOOTING TIPS
If the unit has some problem to work properly, the LED on hydro unit will flash and some error codes
will be displayed on the controller.
The following table described the explanation of error codes on the LCD display.
Thermistor
• Check its resistance. 10kohm @ 24°C(Hydro unit), 220kohm@24°C(DHW Tank, Solar)
• Check its location as shown at the diagram.
• Check its contact status with pipe.
• Final solution is to change parts.
Display Explanation
EVA Inlet thermistor SHORT or OPEN
EVA Outlet thermistor SHORT or OPEN
Wired remote controller thermistor SHORT or OPEN
FRAM Read/Write Error(Wired remote controller data error)
Water Inlet thermistor SHORT or OPEN
Water Outlet thermistor SHORT or OPEN
PHE thermistor SHORT or OPEN
Water TANK thermistor SHORT or OPEN
Tw3
Tw2
Tw1
Tr2
Tr1
Water Out
Water In
Ref' In
Ref' Out
PHE
thermistor
E903
E902
Water
outlet
Water inlet
E901
EVA outlet
E123
EVA inlet
E122
Wired remote controller
thermistor
E653
Water tank
thermistor
E904