Installation manual

19
NOTE: If the same error occurs 10 times or more in
succession, the lock out feature on the compressor will
be triggered. In order to resolve this, the power to the
compressor will have to be turned off and on again.
Figure 39: Output Tests screen
Figure 38: Message log screen
8 Additional Installer Menu Options
Once the commissioning process has been completed,
if you return to the installer menu there will be
various other options now available, as outlined in
this section.
8.1 Message log
The message log menu provides a list of all errors
that have taken place, including the date and time
when they occurred. Selecting an individual error
code will provide more information on the type of
error that occurred if an SD card is present. Active
error messages will show a ticked box.
Figure 38 shows the list of errors shown in the
‘messagelist’ menu. When a new error occurs, it will
appear at the top of the list. Up to 20 errors can be
shown on the list at once, then, if another error
occurs, the oldest error will be pushed off the list to
make room for the new error. If the same error
message is being displayed more than once, it may be
necessary to check back through some of the older
error messages in order to find the cause of the
problem.
8.2 Output Tests
The output tests menu allows you to turn ON/OFF
tests on individual components of the system, as
shown in figure 39, and can be accessed once
Electrical Connections (Space Heating) are confirmed.
The relays which control the immersion and backup
heater/buffer use an electric interlocking system, and
therefore R7 and R8 must be used together in order
for the backup heater to function. Testing these relays
individually will not reflect this.
8.3 Defrost
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.
8.4 Operating 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.
8.5 History
The History menu shows the temporary run time
history of the components 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.
9 Service Menu
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. Please see ‘A Class Air Source Heat
Pump A12M/A16M: Service Manual’ for more details.
NOTE: For successful commissioning you MUST follow through the menu until you see the screen shown in
figure 39. If you do not see this screen, commissioning has not been successful and will void warranty of the
heat pump.
LOGIN 22,
THEN 998
Figure 40: Information screen Login for Service Menu