1.
Check if the Control Transformer button is pulled
out.
4.
Is there 110 VAC between #1 & #2 on the 110 VAC Terminal Strip? If not, check
the fuse on the output side of the Control Transformer. If fuse is good, check power
coming out of Control Transformer.
5.
If no power on the output side, and there is power going into the top of the Control
Transformer, replace the Control Transformer.
6.
If there is power at the Control Transformer, check the wiring of the black and
white wire going from the Control Transformer to the 110 VAC Terminal Strip.
2.
Is the Disconnect Switch on the main electrical cabinet set to
ON?
Switch
3.
Is there 208, 220, 440, or 575 VAC to the top side (input) of the Control Trans-
former? If not, check the fuses at the Fuse Block, and the contacts on the Control
Transformer button on the switch panel.
Input
High Vac
Output
110 Vac
Typical Control Transformer
Control Power Light OFF
Troubleshooting Electrical Problems
6-9
KVAL 990-HB Operation / Service Manual
Summary of Contents for 990-HB
Page 4: ...KVAL 990 HB Operation Manual ...
Page 25: ...Safety Sign Off Sheet 1 17 KVAL 990 HB Operation Service Manual ...
Page 26: ...Safety Sign Off Sheet 1 18 KVAL 990 HB Operation Service Manual ...
Page 66: ...Diagnostic Screen 2 40 KVAL 990 HB Operation Service Manual ...
Page 84: ...Calibration of the Back Section 3 18 KVAL 990 HB Operation Service Manual ...
Page 88: ...System IT Administration 4 4 KVAL 990 HB Operation Service Manual ...