<Wter Valve>
Valve A
Water Outlet Valve (Two way valve)
Valve B
By-Pass Water Control Valve
Valve C
Water Control Valve
<Gas Valve>
Valve D
Solenoid Valve 1
Valve E
Solenoid Valve 2
Valve F
Solenoid Valve 3
Valve G
Proportional Valve
Valve H
Gas Inlet Valve
Error
Symptom Error
Symptom Error
Symptom
31
Wrong Gas Type
331
Mixing Thermistor Fail
701
Abnormal Mixing Thermistor
101
Insufficient Gas Supply
391
Abnormal Thermocouple
711
Abnormal Gas Solenoid Valve
111
Ignition failed
510
Abnormal Main Gas Valve
721
Computer Pre-post Check Problem
121
Loss Flame
541
Abnormal Two-Way Valve
741
Main remote control Trouble
141
Hi-Limit Switch Trip
611
Abnormal Fan Motor
751
Temperature Remote control Trouble
311
Output Thermistor Fail
651
Abnormal Bypass Valve
761
Multi-system Controller
321
Inlet Thermistor Fail
661
Abnormal Output Adjust Valve
991
Abnormal Burning
211
Vent Pipe
441
Flow Sensor
Hi-limit switch works
(=>208F)
Circuit board for Valve D
failure
Abnormal high water
temperature
⑥
Open Short:
Output Temp. Thermistor
Open Short:
Mixing Temp. Thermistor
Open Short:
Inlet Temp. Thermistor
Thermo fuse cut off
(=>360F)
Flame detector
Display: running off