IKONIC Tankless Water Heater Service Manual
17
GENERAL INFORMATION
DIAGNOSTIC POINTS ON CONTROL BOARD
CONNECTION # WIRE COLOR NORMAL VALUE WHAT ARE YOU CHECKING?
D
W6 - BL4 DC 144 - 192 V Does the fan motor have the proper voltage?
Y1 - BL4
DC 4 - 10 V
(Pulse)
Is the fan motor producing regular pulse?
R3 - BL4 DC 12 - 18 V Does the fan motor have the proper voltage?
E R5 - BK4 DC 11 - 17 V Does the user interface have voltage?
H GY1 - GND AC 1 - 100 V Flame rod detecting flame?
I
W12 - W13 5KΩ - 500KΩ Is the Over Heat Limiter OK?
BR9 - BK8
DC 2 - 5V
(Pulse)
More than 1,310
pulses/minute
Does the water flow sensor send a pulse?
(Only when water is flowing thru the unit)
R10 - BK8 DC 11 - 17V
Does the water flow sensor have voltage?
(Power ON; no water flow)
W7 - BK5
68°F = 10.3 k Ω
104°F = 4.9 k Ω
Is the water inlet thermistor working?
BL1 - BK5
68°F = 10.3 k Ω
104°F = 4.9 k Ω
Is the water outlet thermistor working?
Y11 - BK5
68°F= 10.3 k Ω
104°F= 4.9 k Ω
Is the heat exchanger thermistor working?
R4 - BK5
68°F = 10.3 k Ω
104°F = 4.9 k Ω
Is the exhaust thermistor working?
G
W4-BK16 4-16 DC volts
Does water control valve have the proper
voltage
R14-BK16 4-16 DC volts
Does water control valve have the proper
voltage
G12-BK16 4-10 DC volts
Does water control valve have the proper
voltage
W3-BK15 4-16 DC volts
Does water bypass control valve have the
proper voltage
R13-BK15 4-16 DC volts
Does water bypass control valve have the
proper voltage
G11-BK15 4-10 DC volts
Does water bypass control valve have the
proper voltage
J
W2-BK8 4-16 DC volts Does Gas motor have the proper voltage
R7-BK8 4-16 DC volts Does Gas motor have the proper voltage
G6-BK8 4-10 DC volts Does Gas motor have the proper voltage
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