Chapter 7 Error Codes & Troubleshooting
Chapter 7 Error Codes & Troubleshooting
104
This procedure requires access to the circuitry of a live power unit. Dangerous accidental contact with line voltage
is possible. Only qualified personnel should 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 should 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 7.1
(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 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
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.
(4) Refer to
for some probable causes and actions.
Table 7.2
(4) Refer to
for some probable causes and actions.
Table 7.2
(2) Check each point listed below. History has shown that many control problems are simply caused by a
problematic setup
(2) Check each point listed below. History has shown that many control problems are simply caused by a
problematic setup
