Troubleshooting - Hayward H250FDN Service & Installation Manual

5
Figure 53: TROUBLESHOOTING
Code Fault
Heater will not
power up.
None
Low voltage
circuit fault.
None
Open FC1 and/or
FC2 Fuses.
None
Diagnosis Step
1. Check for Low & High
Voltage Output from Fuse
Board
2. Ensure field power
supply to heater is turned
on.
3. Check for faulty Fuse
Board wiring.
4. Verify that FC1 and FC2
Fuses on Fuse Board are
not open.
5. Verify that 0vac
Voltage Selector Plug is
not installed with a 10vac
field power supply
6. Check for defective
Transformer.
7. Fuse Board is defective
1. Check for Low Voltage
Output from Fuse Board
2. Check for faulty Control
Module wiring.
. Verify low voltage input
to Control Module.
. Verify that F1 Fuse on
Control Board is not open.
5. Verify that FC3 on Fuse
Board is not open
6. Check for defective
Transformer.
7. Fuse Board is defective
1. Verify that 120VAC
Voltage Selector Plug is not
installed with a 240VAC
field power supply.
2. Check for faulty
Transformer wiring.
. Defective Transformer
Remedy
Disconnect plug from P5 connector from Fuse Board. Measure
for VAC between pins of receptacle on Fuse Board. Reconnect
plug. Disconnect plug from P of Fuse Board. Measure for 10VAC
between pin  and  of receptacle on Fuse Board. Reconnect plug. If
OK, proceed to section titled ''Low voltage circuit fault''. Otherwise,
proceed to step .
Measure for field supply voltage across terminals of TB1 terminal block
on Fuse Board. If OK, proceed to step 3
Insoect Fuse Board wiring. Ensure all plugs are securely fastened to
Fuse Board. If OK, proceed to step 4.
Remove FC1 and FC2 fuses from fuseholder. Measure continuity across
fuse. If fuses are open, proceed to section titled ''Open FC1 and/or FC2
Fuses''. If fuses are OK, reinstall them and proceed to step 5.
Check that proper Volatage Selector Plug is installed in Fuse Board. If
OK, proceed to step 6
Disconnect plug from P connector from Fuse Board. Mesure for
VAC between pins 1 &  of plug of Transformer and 10VAC between
pins  & . If VAC or 120VAC is not present, replace Transformer.
Otherwise, proceed to step 7.
Replace Fuse Board.
Diconnect plug from P5 connector from Fuse Board. Measure for
24VAC across pins. Reconnect plug. If OK, proceed to step 2.
Otherwise, proceed to step 5.
Inspect Control Module wiring. Ensure all plugs are securly fastened to
Control Module. If OK, proceed to step 3.
Verify 24VAC across R and C terminals on Control Module. If not OK,
replace harness. If OK, procced to step 4.
Remove F1 fuse from fuseholder. Measure continuity across fuse. If
OK, replace Control Module. If fuse is open, proceed to section titled
''Open FC3 or FC1 Fuses''.
Remove FC3 fuse from fuseholder. Measure continuity across fuse. If
fuse is open, proceed to section titled ''Open FC3 or FC1 Fuses''. If OK,
reinstall fuse and proceed to step .
Disconnect plug from P connector from Fuse Board. Mesure for
24VAC between pins 1 & 2 of plug from transformer. If 24VAC is not
present, replace Transformer. Otherwise, proceed to step 7.
Replace Fuse Board
Check that proper Voltage Selector Plug is installed. If OK, proceed to
step .
If 120VAC plug is installed and field supply voltage is 240VAC, FC1 and
FC2 fuses will have to be opened. Install the correct Voltage Selector
Plug and new FC1 and FC2 fuses.
Inspect Transformer wiring. Ensure insulation on wiring is not worn. If
OK, proceed to step 3.
Replace Transformer.