Troubleshooting; Fault Finding And Remedies - hurlcon MX 125 Installation And Operating Instructions Manual

HEATER WILL NOT LIGHT
Possible cause
Automatic ignition system fails
Pump not running
Pump airlocked
Filter dirty
Pump strainer basket clogged
Defective gas control
Thermostat turned off
Set temperature lower than water temperature
Water too hot-fault condition displayed
HEATER SHORT CYCLING (RAPID ON AND OFF OPERATION)
Possible cause
Insufficient water flow
Defective wiring
Defective high limit or thermostat
HEATER MAKING KNOCKING NOISES
Possible cause
Heater operating after pump has shut off
Heat exchanger scaled
If the heater cannot be made to perform correctly, please contact the Hurlcon office closest to you.
MX Pool and Spa Heater

TROUBLESHOOTING

Remedy
Check if power to heater is turned on and
pump is in operation
Start pump
Check for leaks
Clean filter
Clean strainer
Shut off gas supply and call for service
Turn on
Increase set temperature
Refer to fault indication table
Remedy
Clean filter and pump strainer
Repair or replace wiring
Repair or replace
Remedy
Shut off gas supply and call for service
Shut off gas supply and call for service
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