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OPERATION & SERVICE
Servicing should only be performed by a Qualified Service Agent
40
ECO Voltage Test
1 Ensure the main breaker or disconnect switch is turned on.
2 Verify the CCB has the correct input voltage at the J2 socket and is properly grounded - perform the
Checking Power and Ground To The CCB tests on page 46.
3 Using an AC volt meter; set the volt meter to an AC voltage range just above 120 VAC.
4
Check for 120 VAC to the ECO: With the J5 plug installed in the J5 socket on the CCB (page 42) insert
one of the two volt meter probes into pin 1 of J5 plug as shown in the “120 VAC To ECO” image below. Volt
meter probe may have to be pressed firmly into plug to make contact with the metal conductor inside.
Touch the other volt meter probe to the ground wire connection on the water heater as shown in the
“Ground Connection” image below. The measured voltage should be approximately 120 VAC.
• If the measured voltage is approximately 120 VAC proceed to Step 5.
• If the measured voltage is zero or considerably less or more than 120 VAC and all Steps above have
been performed call the toll free Technical Support phone number listed on the back cover of this
manual for further assistance.
5
Check for 120 VAC from the ECO: With the J5 plug installed in the J5 socket on the CCB (page 42) insert
one of the two volt meter probes into pin 1 of J5 plug as shown in the “120 VAC From ECO” image below.
Volt meter probe may have to be pressed firmly into plug to make contact with the metal conductor inside.
Touch the other volt meter probe to the ground wire connection on the water heater as shown in the
“Ground Connection” image below. The measured voltage should be approximately 120 VAC.
• If the measured voltage is approximately 120 VAC the ECO switch is closed, the control system
should not be declaring an ECO fault condition. If the control system continues to lock out displaying
the “Energy Cut Out (ECO)” Fault message in this condition call the toll free Technical Support
phone number listed on the back cover of this manual for further assistance.
• If the measured voltage is zero volts or considerably less than 120 VAC perform the “ECO
Continuity Test” on page 39.
120 VAC To ECO 120 VAC From ECO
Ground Connection