Instruction manual

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Chapter 7 Error Codes & TroubleshootingChapter 7 Error Codes & Troubleshooting
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This procedure requires access to the circuitry of a live power unit. Dangerous accidental contact with line voltageThis procedure requires access to the circuitry of a live power unit. Dangerous accidental contact with line voltage
Troubleshooting Procedures :Troubleshooting Procedures :
(1) If an error message is displayed, refer to to see what cause it is and apply a corrective action to the
failed unit.
Table 7.1(1) If an error message is displayed, refer to to see what cause it is and apply a corrective action to the
failed
unit.
Table
7.1
Line wires are improperly connected
No voltage between line terminals
Incorrect voltage between line terminals
Connections to terminals are open, missing or loose
Thermocouple is open at tip
Thermocouple lead is broken
Shorted thermocouple leads
Short across terminals
Open or shorted heater circuit
Open coil in external contactor
Burned out line fuses
Burned out relay inside control
Defective solid-state relays
Defective line switches
Burned out contactor
Defective circuit breakers
Line wires are improperly connected
No
voltage between line terminals
Incorrect
voltage between line terminals
Connections
to terminals are open, missing or loose
Thermocouple
is open at tip
Thermocouple
lead is broken
Shorted
thermocouple leads
Short
across terminals
Open
or shorted heater circuit
Open
coil in external contactor
Burned
out line fuses
Burned
out relay inside control
Defective
solid-state relays
Defective
line switches
Burned
out contactor
Defective
circuit breakers
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
(3) If the points listed on the above chart have been checked and the controller does not function properly, it is
recommended that the instrument be returned to the factory for inspection.
Do not attempt to make repairs without qualified engineer and proper technical information . This may create
costly damage. Also , it is advisable to use adequate packing materials to prevent damage in transportation.
(3) If the points listed on the above chart have been checked and the controller does not function properly, it is
recommended
that the instrument be returned to the factory for inspection.
Do
not attempt to make repairs without qualified engineer and proper technical information . This may create
costly
damage. Also , it is advisable to use adequate packing materials to prevent damage in transportation.
(4) Dismantle the controller according to .
Refer to for some probable causes and actions.
Figure 7.1
Table 7.2
(4) Dismantle the controller according to .
Refer
to for some probable causes and actions.
Figure
7.1
Table
7.2
(2) Check each point listed below. Most Temperature control problems are not related directly to the control itself.(2) Check each point listed below. Most Temperature control problems are not related directly to the control itself.
Figure 7.1Figure 7.1
ETR-3400