Chapter 5 Error Codes & TroubleshootingChapter 5 Error Codes & Troubleshooting
This procedure requires access to the circuitry of a live power unit. Dangerous accidental contact with line voltage
is possible. Only qualified personnel are allowable to perform these procedures. Potentially lethal voltages are
present.
This procedure requires access to the circuitry of a live power unit. Dangerous accidental contact with line voltage
is possible. Only qualified personnel are allowable to perform these procedures. Potentially lethal voltages are
present.
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
failure unit.
Table 5.1(1) If an error message is displayed, refer to to see what cause it is and apply a corrective action to the
failure unit.
Table 5.1
Line wires are improperly connectedLine wires are improperly connected
No voltage between line terminalsNo voltage between line terminals
Incorrect voltage between line terminalsIncorrect voltage between line terminals
Connections to terminals are open, missing or looseConnections to terminals are open, missing or loose
Thermocouple is open at tipThermocouple is open at tip
Thermocouple lead is brokenThermocouple lead is broken
Shorted thermocouple leadsShorted thermocouple leads
Short across terminalsShort across terminals
Open or shorted heater circuitOpen or shorted heater circuit
Open coil in external contactorOpen coil in external contactor
Burned out line fusesBurned out line fuses
Burned out relay inside controlBurned out relay inside control
Defective solid-state relaysDefective solid-state relays
Defective line switchesDefective line switches
Burned out contactorBurned out contactor
Defective circuit breakersDefective circuit breakers
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
(3) If the points listed on the above chart have been checked and the controller does not function properly, it is
suggested that the instrument be returned to the factory for inspection.
Do not attempt to make repairs without qualified engineer and proper technical information . It 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
suggested that the instrument be returned to the factory for inspection.
Do not attempt to make repairs without qualified engineer and proper technical information . It may create
costly damage. Also , it is advisable to use adequate packing materials to prevent damage in transportation.
(2) Check each point listed below. Experience has proven that many control problems are caused by a defective
instrument.
(2) Check each point listed below. Experience has proven that many control problems are caused by a defective
instrument.
UM83001A-August-2024
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