LX and LT Pool Heaters | Page 21 |
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LX/LT HEATER SERVICE DIAGNOSTIC GUIDE
DISPLAY CODE
CAUSE
REMEDY
| PRESS SW * | 1. | Pump is not running. | 1. | This is a normal display when the pump is OFF. No | ||
| (pressure switch) |
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| Service Required. |
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| Low pump pressure. |
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| Clean filter or clear blockage/check position of valves |
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| 2. | 2. | ||||
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| in plumbing system. |
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| 3. | Device connected at “Fireman | 3. | This is a normal display when a device connected | ||
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| Switch” terminal block is open. |
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| to the “Fireman Switch” operates to open the |
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| safety circuit on the heater. |
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| 4. | Pressure switch fault. | 4. | Adjust or replace pressure switch. | ||
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| Refer to qualified service personnel. |
| HI LIM SW | 1. | Water temperature in heater exceeds | 1. | Identify and correct cause of overheating. | ||
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| the internal limit. |
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| Refer to qualified service personnel. |
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| 2. | Limit switch fault. | 2. | Identify and correct loose connections or replace | ||
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| switches. |
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| Refer to qualified service personnel. |
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| EXT SW 1 | 1. | Flue gas vent switch tripped. | 1. | Verify proper fan operation. Check for restriction or | ||
| (extra switch 1) |
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| (manual reset) |
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| blockage of flue. Reset switch after problem is |
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| corrected. |
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| 2. | Vent switch fault. | 2. | Identify and correct loose connections or replace | ||
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| switch. |
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| Refer to qualified service personnel. |
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| 3. | Fusible link fault | 3. | Identify and correct loose connections or replace | ||
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| fusible link. |
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| Refer to qualified service personnel. |
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| AIR FLO SW | 1. | Broken, split, pinched or | 1. | Check tubing and replace if necessary. | ||
| (air flow switch) |
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| disconnected fan/switch tubing. |
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| 2. | Fan not operating. | 2. | Correct fault or replace fan. | ||
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| Refer to qualified service personnel. |
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| 3. | Fan running slow or premature fan | 3. | Verify proper wiring for 120VAC or 240VAC. Refer to | ||
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| failure. |
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| qualified service personnel. |
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| 4. | Air flow restricted at intake or | 4. | Check for proper clearances around heater and for | ||
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| discharge. |
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| adequate room ventilation if enclosed. Inspect for |
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| blockage or restriction at discharge or flue. |
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| Refer to qualified service personnel. |
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| AGS | 1. | Oscillating pump pressure. | 1. | Clean filter or identify and repair cause of pump | ||
| (automatic gas |
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| oscillation. |
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| 2. | Low gas supply pressure. | 2. | Identify and repair incorrect supply pipe size or | ||
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| pipe line blockage. |
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| Refer to qualified service personnel. |
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| 3. | No flame at burners. | 3. | Identify and correct loose wiring connections, or | ||
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| problems with igniter, flame sensor , gas valve, or |
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| ignition control. |
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| Refer to qualified service personnel. |
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| EXT SW 2 |
| Not used in this model. |
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| (extra switch 2) |
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| TEMP SENSOR* | 1. | Faulty wiring or connection | 1. | Inspect Sensor wiring. Ensure sensor is plugged into | ||
| (temperature sensor) |
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| back of control panel. |
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| 2. | Replace Temperature Sensor. | ||
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| 2. | Failed Sensor | ||||
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| Refer to qualified service personnel | |||
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*NOTE: When these messages are displayed, the Controls are still operable and the heater will operate normally when the displayed condition is remedied. Faults (shown above without an asterisk (*) will shut down the Heater and Control Panel and a flashing “SERVICE” is displayed.
