Tuttnauer 2540 EHS, Technician Manual

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108
Corrections
34.4.1
If terminals 1 and 2 do not each read approximately 110 volts to ground then there is a problem with the line voltage wiring going to the SSR
34.4.2
If a voltage of 208 volts is present then the SSR needs to be replaced. If the voltage is still incorrect then the problem is with the line voltage wiring going to the SSR.
34.4.3
If terminals 1 & 2 do not read approximately 110 volts to ground then there is a problem with the line voltage wiring going to the SSR. If the voltage reading across terminals 1 and 2 is higher than 5 volts then replace the SSR.
Possible cause check-up and tests
34.4.1
For 220 volt units (single or three phase), with the device in question in the OFF mode (pressing the PROGRAM KEY to display the date and time will turn the heaters off) a voltage reading from terminal 1 to ground will read approximately 110 VAC. A reading from terminal 2 to ground will read approximately 110 VAC. A reading across terminals 1 & 2 should show 208VAC.
34.4.2
If a voltage of 208 volts is not present across terminals 1 & 2 then unplug the unit and remove the wires. Plug the unit back in and carefully take a reading across the wires
34.4.3
With the device in the ON mode a voltage reading from terminal 1 to ground will read approximately 110 volts AC. A reading from terminal 2 to ground will read approximately 110 volts AC. A reading across terminals 1 & 2 should show a voltage near 0 volts AC
10. TROUBLESHOOTING
(cont.)
10.4
In Process Malfunction
(cont.)
Symptom
34
Testing the Solid State Relay (cont)