Troubleshooting - Baxi H2O 40 GL Manuel D'installation, D'utilisation Et D'entretien

VII. TROUBLESHOOTING
PROBLEM
No hot water at faucets
Insufficient or runs out of hot water
at the faucet
Water at faucet too hot
Boiler cycles more than 5 times per
day in summer
CAUSE
Boiler does not operate.
Circulator does not operate
Improper thermostat setting
Zone valve does not open
Electrical problem
Sediment and/or scale buildup
Clogged filter
Thermostat setting too low.
Under sized boiler with no priority to
domestic water heating.
Peak draw of hot water is greater
than the tank storage.
Sediment and/or scale buildup
Faulty water heater thermostat
Thermostat set to high
Improper system plumbing
Improper wiring.
Excessive demand
Faulty thermostat
Boiler high limit set to low
Sediment and or scale buildup
Press reset button
Check main cut-off switch Check fuses or breakers
Check power supply Check shaft coupling
Check shaft coupling
Turn thermostat to a higher setting.
Check power supply and valve
Check fuses and replace. Check circuit breaker and reset. Check
power supply
If boiler, circulator, and thermostat are operating properly,and the boiler
is cycling on the high limit several times before the tank thermostat is
satisfied, the coil may have a coating of sediment and/or scale.
Clean or replace filter.
Turn the thermostat to a higher setting.
Rewire for priority.
Determine peak usage and compare to tank volume.
Clean coil
Replace thermostat
Lower thermostat setting.
Compare plumbing to installation guide. Inspect check valves.
Refer to Heating Zone Control Manual for wiring.
Reduce demand or consider larger boiler and/or water heater.
Replace thermostat
Increase boiler hi-limit setting
Clean coil
18
SOLUTION
PN 615000250 REV. B [01/09/2019]