Sime MURELLE HE 110 R ErP Manual De Instrucciones página 76

replaced. The electronic board is faul-
ty.
In the case of a sudden lack of voltage, the
burner will immediately switch off. When
voltage returns, the boiler will automati-
cally start up again.
1200
1000
800
600
400
200
0
0 250 500
Flow Rate (l/h)
0 400
Residual head (mbar)
1011 1004
Fault finding
Fault
1. Pump is not running. No
power supply.
2. Pump is not running. Normal
power supply.
3. Pump runs at maximum
speed and cannot be
controlled.
4. Noise in the system.
5. Noise in the pump.
6. Insufficient flow.
76
3.8 HEAD AVAILABLE
TO SYSTEM (fig. 14)
Residual head for the heating system is
shown as a function of rate of flow in the
graph in fig. 14.
The speed of the modulating pump system
750 1000 1250 1500 1750 2000
800 1200 1600 2000 2400 2800
998 981 947 916 843 722
Cause
• System is switched off.
• A fuse in the installation is blown.
• The circuit breaker has tripped.
• Power supply failure.
• Controller is switched off.
• Pump is blocked by impurities.
• Pump is defective.
• No signal from signal cable.
• There is air in the system.
• Differential pressure is too high.
• There is air in the pump.
• Inlet pressure is too low.
• Pump performance is too low.
• Hydraulic system is closed or system pressure is
insufficient.
2250 2500 2750 3000 3250
FLOW RATE (l/h)
3200 3600 4000 4400 4600
590 477 348 233 172
Remedy
Check the system controller.
Replace the fuse.
Check the power connection and switch on the circuit
breaker.
Check the power supply.
Check the controller and its settings.
Remove impurities. Unscrew the deblocking screw at the
front of the pump. Deblock the pump from the front of the
control box with a screwdriver. Be aware of splashing hot
water.
Replace the pump.
Check if the cable is connected to the controller. If it is,
replace the cable.
Vent the system.
Reduce the pump performance at the pump or external
controller.
Let the pump run. The pump vents itself over time.
Increase the system pressure or check the air volume in
the expansion tank, if installed.
Check the external controller and the pump settings.
Check the non-return valve and filter. Increase the
system pressure.
is set as default (installation parameter
PAR 13 = Au).
3500 3750 4000 4250 4500 4750 5000