Other Faults; Operation And Control; Troubleshooting By Users - Stiebel Eltron WWK 300 Guide D'utilisation Et D'installation

1.7 Operation
1.7.1 Overview of the user interface
Description in brackets, see wiring diagram Fig. 8
Abb. 1
Function
WWK 300 / WWK 300 SOL
Only heat pump operation 25 °C to 55 °C.
Single reheating via the electrical heater rod
to 65 °C.
Programmed start of the electrical heater rod
via the time switch.
1.7.2 Description of functions
– Switch (1) switches the entire heat pump
ON (I) or OFF (0).
– Using push button (2), you can activate
a single quick heat-up of the cylinder via
the electrical supplementary heater. After
the top third of the cylinder capacity has
reached a DHW temperature of 65 °C, the
electrical supplementary heater is switched
OFF, but is not automatically switched ON
again.
– An indicator lamp is integrated into push
button (2), which lights up when the
electrical supplementary heater is switched
ON.
– Select the DHW temperature with the rotary
selector (3) of the thermostat,
Fully clockwise
ECO
(frost protect. stage)
In position ECO, the heat pump operates more
efficiently than at the r.h. end stop. You will
need to establish the DHW temperature you
require, because a higher temperature would
result in a larger volume of DHW at approx.
40 °C (temperatures for baths and showers are
generally around 40 °C).
– The time switch (4) is equipped with
a week disk comprising 84 switching
14
Main ON/OFF
switch (1)
ON
ON
ON
segments. The shortest switching period is
2 hours long. Segments pressed inwards
towards the disk centre (approx. 2 mm lift)
are switched ON.
– The DHW display sensor captures the DHW
temperature inside the upper third of the
cylinder (approx. 100 litres).
1.8 Troubleshooting by the user
1.8.1 No hot water
Should you fail to obtain hot water at any
time, you can take the following steps to
remedy that situation.
No electrical power
Check the fuse/circuit breaker in your fuse box.
approx. 55 °C
If it has blown/tripped, replace/reset the fuse/
MCB. Notify your local contractor, if the MCB
approx. 40 °C
trips/fuse blows again when you insert the
approx. 25 °C
mains plug into the socket again.
Still no hot water, even though power is
available
Check, whether the air inlet/outlet is
unobstructed.
The thermoswitch trips out or the high
limit safety pressure limiter switches
the compressor OFF if the compressor
3 (N1)
4 (S5)
Push Clock (4) pro-
button (2) grammed
– –
1x –
– Yes
1 (S1)
2 (S2 / H1)
is overloaded due to excessive ambient
temperature or excessive extract temperature
(>35 °C), or because of a fault in the
refrigerant circuit. Ask your local contractor to
remove the relevant fault.
The thermoswitch automatically switches itself
ON again.
The high limit safety pressure limiter
!
must only be reset by your contrac-
tor after he has removed the cause of the
relevant fault.

1.8.2 Other faults

Safety valve of the cold water supply line drips
This may occur during the heat-up phase and
is completely normal.
Condensate drain drips
This always happens when the surface
temperature of the evaporator is lower than
the ambient dew point temperature.
For all other faults, consult your contractor.
DHW heating can be maintained in most
fault conditions by switching the electrical
supplementary heater ON.