Tech Sheet
13
COMPONENT FROM TO VOLTAGE RESISTANCE NOTES
EV3, 2-Way Valve
(Hot Water)
L1 Junction Block Main Board - F10 120 VAC 444 ohms Valve is grounded to upper
reinforcement, lower and upper
Main Board cover, and heat
exchanger support.
Fan Cooling LED Fan PCB - J1 LED Fan PCB - J1 Pin 1 = +12 VDC (red)
Pin 2 = GND (black)
N/A Digital motor - resistance
cannot be measured.
Flowmeter Main Board - J7 Main Board - J7 Pin 1 - 2 = 5 VDC
Pin 2 - 3 = 0 VDC
Pin 2 - 3 = 5 VDC
N/A The Flowmeter measures the
water used.
Grinder Motor F2 (L1) Main Board - F7 120 VAC 13.1 ohms Can be adjusted only while
grinding.
Hall Sensor Main Board - J8 Main Board - J8 Pin 1 = +5 VDC (black)
Pin 2 = Signal (max 5 VDC) (gray)
Pin 3 = GND (gray)
N/A Current sensor on the diverter
motor assembly that identies
the position of the diverter
motor.
Coffee Heater L1 Junction Block Main Board - F9 (N) 120 VAC 11.4 ohms Dual heater element (23 ohms/
heater). Check TCOs if circuit
is open.
Steam Heater L1 Junction Block Main Board - F8 (N) 120 VAC 15.4 ohms Check TCO if circuit is open.
Diverter Motor J1-5 J1-3 140 VDC* 62 ohms *Voltage polarity reverses to
drive the motor up and down
Power In (Main
Board)
Main Board - F4 (L1) Main Board - F5 (N) 120 VAC N/A Main Board AC in
Power In (LED_Fan
PCB)
LED_Fan F1 (L1) LED_Fan - F2 (N) 120 VAC N/A LED_Fan PCB AC in nominal
Pump Main Board - F1 Main Board - J1-4 120 VAC 6.2 ohms Note polarity - Positive side
is connected to J1-4. If meter
leads are reversed, the coil will
show open.
NTC, Coffee Main Board - J6 Main Board - J6 124.6K ohms 68F (20C) (Nominal)
NTC, Steamer Main Board - J12 Main Board - J12 124.6K ohms 68F (20C) (Nominal)