Installation manual

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4.3.3 D EFROST
Before running a manual defrost cycle you must ensure the buffer has been isolated from the heating, as stated by the
message on the UI. Selecting ‘Start Defrost’ begins the defrost cycle. The defrost screen will state the time remaining in
the defrost cycle.
A heating water return temperature of ≥18°C is required for proper defrosting of the evaporator.
4.3.4 O PERATING DATA
The operating data menu provides a list of all the system parameters, such as all temperatures, including each zone set
and actual temperatures, flow rate, and heat pump status. If an SD card is present, this data will be recorded to every
message listed.
4.3.5 H ISTORY
The History menu shows the temporary and permanent run time history of the system. These values can be reset in
order to record run times over a certain time period. Selecting ‘Next’ brings you to the permanent run time history which
cannot be reset unless a software update is installed.
4.3.6 S ERVICE M ENU
The service menu can be accessed, in a similar manner to the installation menu, by inputting the installer menu code
(22) and then using the ’Login’ access code 998. Access to this menu may be required for fault finding or
servicing.
NOTE: T HIS FUNCTION MUST ONLY BE USED WITH GREAT CARE BY TRAINED INSTALLERS , AS THE CONDENSER PLATE
HEAT EXCHANGER MAY POTENTIALLY FREEZE IF THE WATER FLOW TEMPERATURE IS TOO LOW . T HIS FUNCTION HAS THE
POTENTIAL TO FREEZE THE CONDENSER (F43-47 ERROR MESSAGES ARE DEFROST ERRORS ).