Precision Control Systems 930 - Manual (Page 20)

Model 930 ControlIR TM Instruction Manual Maintenance and Trouble Shooting
Research, Inc. Page 16 of 25
ROUTINE
MAINTENANCE
TROUBLESHOOTING
Maintenance and
Trouble Shooting
The following bi-monthly routine maintenance is suggested:
1. Remove power connection to the system. Lock out power if possible. Carefully
vacuum any dust or dirt collecting within the enclosure. Use caution to not disturb
the wiring. Service more often in dust locations.
2. Clean the outside of the enclosure with glass cleaner and a soft cotton cloth as
necessary.
Symptom Action
Heater Contactor will not
energize. 1. Verify line voltage is applied to the main disconnect
switch.
2. Verify remote heater open, remote process interlocks
or water flow switches (if used) are closed.
3. If not using remote heater enable, heater open
interlocks or water flow switches, verify the 2 pin
jumpers are installed between TB 100 pins 2 to 3, 10
to 11 and 14 to 15.
4. Check fuses FU 1050, FU 1051, FU 107, FU 108 and
TB 100 pin 1.
No output to load, heaters
or lamps. Setpoint switch
is in LOCAL mode. 1. Verify the ‘Heater On’ indicator is illuminated.
2. Verify a 0-5 VDC signal is present on pins 13 and 14
of the power controller connector. This voltage is
proportional to the setting of the local Setpoint
potentiometer or the idle potentiometer (product
detect option) if product is not detected.
3. If the over current light on the controller is
illuminated, check the load wiring, lamp or heater
connections for short circuits.
4. If the shorted SCR light is lit on the controller, refer
to the power controller manual regarding repairs.
5. If the COMMAND led on the power controller is not
lit and a control signal is greater than 10 percent is
applied, refer to the power controller manual
regarding repairs.