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Forced defrost
Forced defrost is used to bypass the timer and temperature conditions for
defrost. Temperature T11 (refrigerant temperature evaporator) must be
below the set stop level for defrosting.
Block crankcase heater at high outdoor temperature
Checked by outdoor sensor T2. When the outdoor temperature exceeds
the set value the crankcase heating in the compressor is deactivated. The
crankcase heater is active when the compressor is idle and the outdoor
temperature is below the set value. Factory setting = 10ºC. Min = 5ºC and
max = 20ºC.
Anti-jamming mode time
At the set time each day the circulation pumps G1 and G2, three-way valve
VXV and fan are run for one minute each, provided that they have not
been in operation during the previous 24 hours. Factory setting = 2, which
means 02:00. Min = 0, max = 23.
Alarm buzzer signal length
In event of an alarm the alarm signal is sounded for the set time if the
signal is not deactivated. The factory setting is 1 minute, max setting is 10
minutes.
T1 Set point value maximum
T1 is set to max, that is 80°C, on delivery. The value may need to be
reduced if only underfl oor heating is used.
Display
The function affects the window contrast and brightness. On delivery the
max setting 10 is set on both.
Alarm during start up
During start up there may be an alarm regarding Low temperature in
condenser. The cause is that the fi lled water is too cold (colder than +5ºC).
Check the sight glass inside the heat pump. Bubbles may appear in the
sight glass for a few minutes during start up. The bubbles should then
stop. If it bubbles continuously this is a fault symptom which is probably
due to insuffi cient refrigerant.
Sight glass
Commissioning
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