Jandy LXi - Service Diagnostic Guide

Page 42 LXi
™
Pool/Spa Heater Installation and Operation Manual
DISPLAY FAULT CAUSE REMEDY
Display shows
FAULT-
PUMP
1. Pump is not running. 1. This is a normal display when the control is in a Maintain
Temp mode. No Service Required.
Display shows
NO FLOW
1. Pump is not running.
2. Low pump pressure.
3. Pressure switch fault.
1. Check breakers and power source, recheck wiring, set time
clock and current time.
2. Clean fi lter or clear blockage, check position of valve
in plumbing system.
3. Adjust or replace pressure switch. Refer to qualifi ed
service personnel.
FAULT-
HIGH LIMIT
1. Water temperature in heater exceeds the
internal limit.
2. Limit switch fault.
1. Verify function of high limit switches. Perform temperature
rise test. Identify and correct cause of overheating. Refer to
qualifi ed service personnel.
2. Identify and correct loose connections or replace switches.
Refer to qualifi ed service personnel.
FAULT-
FUSELINK/FIELD
1. Fusible link fault. 1. Identify and correct loose connections or replace
fusable link. Refer to qualifi ed service personnel.
FAULT-
CHECK IGN CONTROL
1. Broken, split, pinched or disconnected
fan/switch tubing.
2. Fan not operating.
3. Fan running slow or premature fan failure.
4. Air fl ow restricted at intake or discharge.
5. Oscillating pump pressure.
6. Low gas supply pressure.
7. No fl ame at burners.
1. Check tubing and replace if necessary.
2. Correct fault or replace fan. Refer to qualifi ed service
personnel.
3. Verify proper wiring for 120 VAC or 240 VAC. Refer to
qualifi ed service personnel.
4. Check for proper clearances around heater and for
adequate room ventilation if enclosed. Inspect for
blockage or restriction at discharge of fl ue. Refer to
qualifi ed service personnel.
5. Clean fi lter or identify and repair cause of pump oscillation.
6. Identify and repair incorrect supply pipe size or pipe line
blockage.
7. Identify and correct loose wiring connections, or problems
with igniter, fl ame sensor, gas valve, or ignition control.
Refer to qualifi ed service personnel.
FAULT-
SHORTED H2O SENSOR
or
FAULT-
OPEN WATER SENSOR
1. Faulty wiring or connection.
2. Failed sensor.
1. Inspect sensor wiring. Ensure sensor is connected into
Power Interface Board.
2. Replace temperature sensor. Refer to qualifi ed service
personnel.
Table 11. LXi Heater Service Diagnostic Guide