WARNING
High voltage exposure. Use caution to avoid
personal injury during this procedure.
Double Element, Non-Simultaneous,
Single Phase, Off Peak Operation.
(continued)
Not Enough Hot Water (continued).
7. Check voltageacross terminal T4 of upper
thermostat & T2 of lower Thermostat.
(see illustration 27).
A) Rated voltageNOT present,
Replace lower thermostat.
B) Rated voltageis present, okay,
go to step 8.
8. Check voltageacross lower element
(see illustration 28).
A) Rated voltageNOT present,
Check wire connections between
thermostats & element.
B) Rated voltageIS present,
Repeat element testing
see page 15.
Illustration 27 Illustration 28
Page 24
SERVICE PROCEDURE RE-III
Residential Thermostat Testing
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 thermostatsto the lowest setting.
3. Turn power “ON” to water heater and set multi-meter to “Volts AC”.
4. Check acrossterminals L4 and T2 of upper thermostat (see illustration 24 on page23).
A) Rated voltageIS present, replace upper thermostat.
B) Rated voltageNOT present, upper thermostat is okay. Go to step 5 below.
C) Lower than rated voltage IS present,recheck for grounded upper element (see page 15).
5. Check acrossterminals T4 of upper thermostat and T2 of lowerthermostat (see illustration 27 above).
A) Rated voltageIS present, replace lower thermostat.
B) Rated voltageNOT present, lower thermostat is okay.
C) Lower than rated voltage IS present,recheck for grounded lower element (see page 15).
WARNING
Be sure thermostats are reset to their original
temperature settings as found prior to
thermostat testing
24