Hayward 150 - TROUBLESHOOTING LOOKUP CHART; Heater Will Not Power Up Diagnosis; Low Voltage Circuit Fault Diagnosis

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51300004201B
Table17: Troubleshooting Lookup Chart
Code/ Fault
Diagnostic Step
Suggested Troubleshooting Action
No code
displayed
Heater will
not power up
1. Check for Low &
High voltage output
from fuse board
Disconnect plug from P5 connector from Fuse Board. Measure for 24VAC
between pins of receptacle on Fuse Board. Reconnect plug. Disconnect
plug from P6 of Fuse Board. Measure for 120VAC between pin 3 and 5 of
receptacle on Fuse Board. Reconnect plug. If OK, proceed to section titled
‘‘Low voltage circuit fault’’. Otherwise, proceed to step 2.
2. Ensure power
supply to heater is
turned on.
Measure for field supply voltage across terminals of TB1 terminal block on
Fuse Board. If OK, proceed to step 3
3. Check for faulty
fuse board wiring.
Inspect Fuse Board wiring. Ensure all plugs are securely fastened to Fuse
Board. If OK, proceed to step 4.
4. Verify that FC1
and FC2 fuses on
fuse board are
working
Remove FC1 and FC2 fuses from fuse holder. 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.
5. Verify that
voltage selector
plug is installed
Check that proper Voltage Selector Plug 120 or 240 VAC is installed in
Fuse Board. If OK, proceed to step 6
6. Check for
defective
transformer.
Disconnect plug from P4 connector from Fuse Board. Measure for24VAC
between pins 1 & 2 of plug of Transformer and 120VAC between pins 4 &
6. If 24VAC or 120VAC is not present, replace Transformer. Otherwise,
proceed to step 7.
7. Fuse Board is
defective
Replace Fuse Board.
No code
displayed
Low voltage
circuit fault.
1. Check for Low
Voltage Output from
Fuse Board
Disconnect plug from P5 connector from Fuse Board. Measure for24VAC
across pins. Reconnect plug. If OK, proceed to step 2.Otherwise, proceed
to step 5.
2. Check for faulty
ignition control
board wiring.
Inspect ignition control board wiring. Ensure all plugs are securely
fastened. If OK, proceed to step 3.
3. Verify low voltage
input to ignition
control board
Verify 24VAC across R and C terminals on ignition control board. If not
OK, replace harness. If OK, procced to step 4.
4. Verify that F1
Fuse on ignition
control Board is not
open.
Remove F1 fuse from fuse holder. Measure continuity across fuse. If OK,
replace ignition control board. If fuse is open, proceed to section titled
‘‘Open FC3 or FC1 Fuses’’.
5. Verify that FC3
on Fuse Board is
not open
Remove FC3 fuse from fuse holder. 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 6.
6. Check for
defective
Transformer.
Disconnect plug from P4 connector from Fuse Board. Measure for24VAC
between pins 1 & 2 of plug from transformer. If 24VAC is not present,
replace Transformer. Otherwise, proceed to step 7.
7. Fuse Board is
defective
Replace Fuse Board