22
FAULT-FINDING
If the appliance fails to start for no apparent reason and an
operating parameter code (
page 21
) is not displayed on the
programmer, carry out the following checks:
1. Check for failure in the electrical supply.
2. Check for a blown fuse.
3. Check the circuit breaker (if fitted). If this has tripped reset
and restart the appliance.
4.
Ensure there is a current ‘heat demand’ from the
programmer. Ensure the programmer clock and timer
controls have been set in accordance with the instructions
on
pages 6/7
or that it is switched on (if in non-timed
mode).
5. Check the programmer settings by pressing the
SEARCH
button for five seconds.
Setting 1
- set at 26.
Setting 2
- set at 18.
Setting 3
- set at 14.
These are factory-set and should not in normal
circumstances have been altered. If for some reason the
settings do not match the figures above, alteration is made
via the
TEMPERATURE ADJUSTMENT
buttons (
+/-
).
Note:
if the appliance has been shut down due to a failure of the
power supply, the programmer contains a battery backup, which
will allow the preservation of all settings and timings.
If the appliance is operating, but the water temperature is lower
than expected:
1. Check that all isolation valves are fully open.
2. Check the water temperature setting is not too low. This
can be increased by following the instructions on
page 7
.
3. Check that the vents on the back of the unit and the coil
have not become blocked, impeding the air flow.
4. Check the unit has not entered defrost mode (the
DEFROST symbol will appear above the temperature
display see
fig. 1
). Should this occur, the heat output from
the appliance will be diverted to the coil, until any ice build-
up has been removed.
5. Ensure there is no air trapped in either the Activair or the
heating/hot water system.
If sounds are heard from the appliance, which sound like the
passage of water, this is merely the normal movement of the
refrigerant within the unit.
If there is power to the appliance and the programmer is
providing a 'heat demand’ to the unit, yet the unit has not
entered running mode (the SUN symbol has not appeared
above the temperature display), it may be that one of the safety
cut-outs (see
page 8
) has operated. These will typically take
several minutes to clear before the unit restarts.
