
2.8 Solid-state relays (VS1-VS4)
1. Cool down the machine and unplug.
2. Ensure (L1)/VS1 and (T1)/VS1 are open.
3. Ensure (L1)/VS2 and (T1)/VS2 are open.
4. Ensure (L1)/VS3 and (T1)/VS3 are open.
5. Ensure continuity and terminal tightening for the wires: 1.16 1.17 2.12 2.13 6.12
6.13 6.14 6.15 5.24 5.25 5.26 5.27 .
6. Pour water in the kettle in the amount enough to cover the kettle bottom, to avoid over-
heating during following steps.
7. Plug the machine in. Set SA1 to CARAMEL and press HEATING.
8. Ensure voltage from (T1)/VS1 to ground is 120 VAC.
9. Ensure voltage from (T1)/VS2 to ground is 120 VAC.
10. Ensure voltage from (T1)/VS3 to ground is 120 VAC.
11. Ensure voltage from (T1)/VS4 to ground is 120 VAC.
12. Ensure voltage from (L1)/VS1 to ground is 120 VAC whenever pilot light on VS1 is lit.
13. Ensure voltage from (L1)/VS2 to ground is 120 VAC whenever pilot light on VS2 is lit.
14. Ensure voltage from (L1)/VS3 to ground is 120 VAC whenever pilot light on VS3 is lit.
15. Ensure voltage from (L1)/VS4 to ground is 120 VAC whenever pilot light on VS4 is lit.
2.9 Heating elements (EK1-EK6)
1. Cool down the machine and unplug.
2. Ensure the resistance from (L1)/VS3 to (L1)/VS1 is about 24 Ω.
3. Ensure the resistance from (L1)/VS1 to (1)/KM1 is about 24 Ω.
4. Ensure the resistance from (L1)/VS4 to (L1)/VS2 is about 24 Ω.
5. Ensure the resistance from (L1)/VS2 to (1)/KM1 is about 24 Ω.
6. If previous steps indicated OL or significantly other values, then open the kettle, inspect
heating elements and connection wires for any signs of burn out, corrosion and so on. If
found, replace heating elements and wires.
7. Ensure continuity and terminal tightening for the wires: 1.21 1.20 1.19 1.18 2.17
2.16 2.15 2.14 3.7 3.6 3.5 3.4 .
8. Ensure the resistance of each EK1-EK6 is about 12 Ωeach. IF short or open circuit,
replace fault heating element.
9. Ensure each heating element DOES NOT HAVE ground fault, there should be no contact
between each terminal stud and the ground. Replace fault heating element.
10. When rewiring elements, use conductive anti-seize paste on bolted joints between ter-
minal studs of the heaters and the wires.
2.10 Power supply unit (PSU)
1. Cool down the machine and unplug.
2. Ensure continuity and terminal tightening for the wires: 1.10 1.9 1.8 2.6 2.5 2.9
GND4 .
3. Plug the machine in. Set SA1 to CARAMEL.
4. Ensure voltage from (L)/PSU to (N)/PSU is 208 VAC.
5. Ensure voltage from (24V)/PSU to (0V)/PSU is 24 VDC.
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