Pressure Switch Adjustment - Hayward H150FDN Troubleshooting Manual

11. Service LED ON: "LO" Code (cont.)

Pressure switch adjustment

Inspect and test high limits
Step 11C Step 11D
Some sites may require a pressure switch Inspect & test high limits. Verify continuity across
adjustment. IF adjustment does not correct or was the temperature limit switches. IF open or wire is
not required, go to 11D. damaged, replace (pg. 20). IF OK, go to 11E.
Indoor application? Vent pressure switch/tubing
Step 11E Step 11F
IF this heater is installed in an indoor application, Applies To Indoor Installations ONLY: Inspect the
proceed to step 11F. IF heater is installed in an vent pressure switch tube connections. IF OK, go to
outdoor environment, go to step 11I. 11G. IF NOT, repair/replace tubing (pg. 20).
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