WARNING
High voltage exposure. Use caution to avoid
personal injury during this procedure.
Double Element, Simultaneous, Single Phase
Operation (continued)
Water Temperature In Tank Is Above Thermostat
Setting.
1. This procedureassumes line voltage, ECO and
elements are in working order.
2. Adjust upper and lower thermostat to the lowest setting.
3. Turn power “ON” to water heater.
4. Set multi-meter to “Volts AC”
5. Check acrossterminals L4 and T2 of
upper thermostat (see illustration 39).
A) Rated voltageIS present,
replace upper thermostat.
B) Rated voltageNOT present,
upper thermostat is okay. Go to step 6 below.
C) lower than rated voltage IS present,
recheck for grounded upper element
see page 15.
6. Check acrossterminal L3 of upper thermostat and
T2 of lower thermostat (see illustration 40).
A) Rated voltageIS present,
replace lower thermostat.
B) Rated voltageNOT present,
lower thermostat is okay.
C) lowerthan rated voltage IS present,
recheck for grounded lower element
see page 15.
Illustration 39
Illustration 40
Page 28
SERVICE PROCEDURE RE-IV
Light Duty Commercial
Thermostat Testing
28