Hayward H150FDN Troubleshooting Manual page 24

1. Heater Not Powering Up (cont.)
Inspect connections
Test Fuses
Step 1E Step 1F
Verify that FC1 & FC2 fuses aren't open. Replace all
Inspect Fuse Board wiring, ensuring all plugs are
open fuses & go to section 2. IF correct, go to 1G.
securely fastened. IF correct, proceed to step 1F.
Test transformer input Test transformer output
Step 1G Step 1H
Disconnect the P3 plug from the fuse board. Test Disconnect P4 plug from fuse board. Verify 22-
110-125VAC between pins 1&2 and 3&4 on the 28VAC between pins 1 & 2 (red wires), then 110-
board. IF good, go to 1H. IF NOT, replace the Fuse 125VAC between pins 4-6 (grey wires). IF correct,
board (pg. 20). go to 1I. IF incorrect replace transformer (pg.20).
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