Start Light OFF
If the Start light remains unlit, push in the Start button
and hold it in while a second person checks for volt-
age between #2 and #75. If there is 110 VAC, replace
the ACR relay. If there is no voltage while the button
is held in, check the wiring.
First isolate the power supply. Check between DC+
and DC- for 24VDC. If no DC voltage, disconnect
the output (V+ and V-) wires from the 24VDC
power supply and check for DC voltage where
those wires were disconnected.
If no voltage:
Check the input side for 110 VAC. If no 110 VAC, check the fuse. If there is 110
VAC and no 24VDC, replace the 24VDC Power Supply.
If there is 24VDC:
Reconnect the output wires to the 24VDC power supply.
Trace the output wire to the DC terminal block.
Disconnect all (+ 24V positive) wires from the + DC from the DC terminal block
except the + output wire from the + 24VDC power supply.
Check for +24VDC at between any –DC and +DC terminal on the DC Terminal
block.
Reinstall the (+ 24V positive) wires one by one, checking for +24VDC after
installing each. If at any point no voltage is found trace the last reinstalled wire and
check for shorts.
Input 110 VAC
Output 24 VDC
24VDC Light OFF
Troubleshooting Electrical Problems
KVAL 994-X Operation/Service Manual
6-30
Summary of Contents for 994-X
Page 4: ...KVAL 994 X Operation Service Manual ...
Page 31: ...Safety Sign Off Sheet 1 21 KVAL 994 X Operation Service Manual ...
Page 32: ...Safety Sign Off Sheet KVAL 994 X Operation Service Manual 1 22 ...
Page 110: ...Calibration of the Back Section KVAL 994 X Operation Service Manual 3 22 ...
Page 114: ...System IT Administration KVAL 994 X Operation Service Manual 4 4 ...
Page 144: ...Collet Torque Values KVAL 994 X Operation Service Manual 5 30 ...
Page 180: ...Symptoms and Possible Causes KVAL 994 X Operation Service Manual 6 36 ...
Page 185: ......
Page 186: ......
Page 187: ......