TROUBLE SHOOTING CONTINUED:
Replace thermostat if contacts are open when knob is fully clockwise and water tem
-
perature is less than 190º F. You will measure 120 volts (approximately) to ground from
both thermostat terminals when it is ON and from only one terminal when it is OFF.
In this water boiler there are two elements in parallel. Failure of either will cause very
slow heating. Perform the following tests:
a. Clamp-on ammeter test: If both elements are good, you will measure about 21 amps
at 240 volts, 24 amps at 208 volts or 29 amps at 120 volts. If you measure only 10
to 12 amps, check the current to each element to identify the defective part.
b. Ohmmeter or continuity test: Disconnect all power by unplugging unit. Disconnect
one terminal to measure each element. They should each have continuity or mea
-
sure about 20 ohms.
2. Defective thermostat
3. Heating element burned
out.
SOLUTION
POSSIBLE CAUSE
PROBLEM: WATER DOES NOT REACH PROPER TEMPERATURE
ELECTRICAL SCHEMATIC DUAL VOLTAGE 120V/220V
5
L
PROBE
ORANGE
RED #10
THERMOSTAT
WHITE
WHITE
BLUE
BLACK #18
2 - 3.5 KW HEATING
ELEMENTS
BLUE #10
T1
T2
T3
T4
WATER
LEVEL
CONTROL
BOARD
L1
N
L2
3
1
2
POWER
BLOCK
1
2
3
NL
L
2
1
12
RED #10
RED #10
GREEN
12
2
NN
N
L
1
N
NN
N
N L L
L
22
2
N
N
L
1
LL
L
L
1
L
L
N
N
NL
L
1
12
1
L
12
22
2
1
1
NN
N
2
120 220VAC 2080 000W 1 .3 31.8A 1
W B WB10 -1 2
10/1/08
