On systems with no auxiliary heat source and no backup electric heater, the heat pump will then operate until the
water temperature rises to the set temperature or the heat mode running operation is exited by pressing
OK
.
If any error code is displayed during the cool mode running operation, the cause should be investigated. Refer to Part 3, 9
“Error Code table”.
7.14.7
DHW MODE RUNNING operation
The
DHW MODE RUNNING
operation is used to check the operation of the
system in DHW mode.
During the
DHW MODE RUNNING
operation, the DHW set temperature is 55°C.
On systems where an immersion heater is installed, the immersion heater will
turn on once the heat pump has run for 10 mins. The immersion heater will turn
off 3 mins later and the heat pump will operate until the water temperature rises
to the set temperature or the DHW mode running operation is exited by pressing
OK
.
7.15
SPECIAL FUNCTION
7.15.1
SPECIAL FUNCTION menu overview
MENU > FOR SERVICEMAN > SPECIAL FUNCTION
SPECIAL FUNCTION
is used to purge air, pre-heating floor and drying up floor once
installation is complete or the first time start up the unit or restart the unit after a
long time stop.
7.15.2
AIR PURGE
MENU
>
FOR SERVICEMAN
>
SPECIAL FUNCTION
>
AIR PURGE
Once installation is complete it is important to run the air purge function to remove any air which may be present in the
water piping and which could cause malfunctions during operation.
Make sure that the air purge valve is open then select
13.1 AIR PURGE
on the
SPECIAL FUNCTION
menu.
At the start of air purge operation, the 3-way valve opens, and the 2-way valve closes. After 60 seconds, the circulator
pump in the unit starts and operates for 10 minutes, during which the water flow
switch is disabled. Once the pump stops, the 3-way valve closes and the 2-way
valve opens. 60 seconds later both the circulator pump in the unit (PUMPI) and the
external circulator pump (PUMPO) start and operate until the air purge operation is
exited on the user interface.
Whilst the air purge operation is running, the number of minutes that it has been
running for is displayed on the user interface. During the air purge operation, all
buttons except
OK
are inactivated. To exit the air purge operation, press
OK
and
then select
YES
when prompted. Refer to Figure 3-7.47.
Figure 3-7.45:
DHW MODE RUNNING display
Figure 3-7.46:
Special functions menu
Figure 3-7.47:
Exit air purge screen
79
