Fault Finding; Alarm Reset - Heatrae Sadia Amptec Installation Instructions And User Manual

12.0 FAULT FINDING

Indicator Flashing /
Steady
Alarm (Top) Flashing Red
Alarm (Top) Steady Red
Call (Bottom) Flashing Red
Call (Bottom) Steady Red
NOTE: It may be necessary to fit a capacitor between the 'R' run and 'N' neutral terminals on the control
connector to prevent the boiler continuing to run when the cylinder and the room thermostats are satisfied. This
is due to a leakage current from some manufacturers 3 port valves. The capacitor required is 0.47 micro-farads
suitable for 275 volts AC (X2 style). These capacitors are available from Heatrae Sadia part number 95 612 708.

13.0 ALARM RESET

There are 3 steps to reset a tripped condition: -
1 Switch "OFF" the electrical supply.
2 Correct the fault, check the system is full of water and set to the correct pressure (sealed systems) and
there is a good flow of water (i.e. all the valves are open).
3 Switch the supply back "ON".
Ensure the customer fully understands the operation of the system.
The boiler must NOT be operated if it is known to have a fault. Switch off, and call a service engineer. (see p.32
for contact details)
22
Cause Action
No Water There is No water in the system, switch OFF imme-
diatly. Check and fill before restarting.
Thermistor Fault Check Conn 4 is connected properly on the Main
PCB.
Replace thermistor if necessary
Over Tempera- Check direction of flow through the boiler from the
ture Switch pump. Heat output at the top, cold in at the bot-
tom. Turn pump if necessary.
Check Conn 3 is connected properly on the main
PCB.
100°C Control Check thermistor is mounted properly on the heat
Trip exchanger.
If necessary change control PCB.