REMEHA Quinta Pro series Installation, User And Service Manual page 67

Error code Description
Return temperature too low
Return temperature too
high
Difference between the flow
and return temperatures too
great
Temperature of heat ex­
changer above normal range
(high-limit thermostat STB)
Five failed burner starts
123157 - v.06 - 24022015
Possible cause
Bad connection
Sensor failure
Sensor not connected or in­
correctly connected
No flow
Sensor failure
Sensor not connected or in­
correctly connected
No flow
Bad connection
Sensor failure
Sensor not connected or in­
correctly connected
No flow
No ignition spark
Ignition spark but no flame
Flame present, but ionisation
has failed or is inadequate
Check/solution
Check the wiring
Replace the sensor if necessary
Vent the central heating system
Check the flow (direction, pump, valves)
Check the water pressure
Check that the sensors are operating cor­
rectly
Check that the sensor has been fitted prop­
erly
Check the cleanliness of the heat exchang­
er
If present: check setting of boiler type pa­
rameter
Replace the sensor if necessary
Vent the central heating system
Check the flow (direction, pump, valves)
Check the water pressure
Check that the sensors are operating cor­
rectly
Check that the sensor has been fitted prop­
erly
Check the cleanliness of the heat exchang­
er
Check that the heating pump is operating
correctly
If present: check setting of boiler type pa­
rameter
Check the wiring
Replace the sensor if necessary
Vent the central heating system
Check the flow (direction, pump, valves)
Check the water pressure
Check that the sensors are operating cor­
rectly
Check that the sensor has been fitted prop­
erly
Check the cleanliness of the heat exchang­
er
If present: check setting of boiler type pa­
rameter
Check cabling of ignition transformer
Check the ionisation/ignition electrode
Check breakdown to earth
Check the condition of the burner cover
Check the earthing
Defective control SU PCB
Vent the gas supply to remove air
Check that the gas valve is fully opened
Check the gas supply pressure
Check the operation and setting of the gas
valve unit
Check that the air supply inlet and flue gas
outlet are not blocked
Check the wiring on the gas valve unit
Defective control SU PCB
Check that the gas valve is fully opened
Check the gas supply pressure
Check the ionisation/ignition electrode
Check the earthing
Check the wiring on the ionisation/ignition
electrode
11 Troubleshooting
67