Sedecal SHF-310 - Page 293

HF Series Generators
T roubleshooting
TR-1005R4
53
ERROR CODE : E21
DESCRIPTION : Wrong T ube-1 selection.
ERROR TYPE : Informative. Does not allow working unless the error is solved or other tube is selected.
APPLICABLE TO : All Generators.
APPEARS WHEN : At any moment mainly after initialization or when changing tube selection.
INFORMATION / SYMPTOM : Wrong tube 1 selection.
POSIBLE CAUSES
The –HT INTLK is not grounding (tube 1 selection).
Defective HV Switch inside the HV Transformer (two tubes option).
The --HT INTLK is missing.
ACTIONS
Only for one tube option (no Compact Generators):
1. Check signal –HT INTLK in pin 9 of TB1 in the HV Transformer , it should be 0 VDC in tube 1
selection.
2. If it is not OK, check pin 9 of TB1 and ground is 0 Ω. If it is not, replace the HV Transformer.
3. If it is OK, check signal -HT LINK in ATP Console Board (J3-13), if not “0” in J3-13, check link
between TB1-9 and J3-13, if voltage = “0” and E21 appears, replace A TP Console Board.
Only for one tube option (Compact Generators):
1. Check the –HT INTLK in 6J3-13 (Generator Cabinet), it should be “0” VDC in tube 1 selection.
2. If it is not OK, check Jumper between 6J3-13 and 6J3-16 (GND).
3. If 6J3-13 = 0, check 6J3--13 in A TP Console Board.
4. If not “0” in J3-13, check link between TB1-9 and J3-13, if voltage = “0” and E21 appears, replace
ATP Console Board.
Only for two tubes option (no Compact Generators):
1. Check the –HT INTLK in pin 9 of TB1 in the HV Transformer, it should be 0 VDC in tube 1
selection.
2. If it is not OK, check between pin 9 of TB1 and ground is 0 Ω. If not replace the HV Transformer.
3. If it is OK, check 0V at J2-13 in A TP Console.
a. If it is not OK, check between J3-13 in A TP and TB1-9.
b. If it is OK, replace ATP Console Board.
Only for two tubes option (Compact Generators):
1. Check logic “0” in J3-13 in ATP Console Board, if “0” VDC, replace ATP Console Board.
2. If not “0”, turn off equipment, disconnect J1 of HV Transformer and check continuity between
J1-J and J3-13 in ATP Console Board.
3. If it is not OK, check cable and replace if necessary.
4. If connection is OK, replace HV Transformer.