Parameter
Meaning
BELOW 5°C DEFR
Safety defrosting occurs when the outdoor temperature has been below 5°C for a set num-
ber of days.
Factory setting: 7D, range:
, 1D – 14D
MAX TIME DEFR
Longest permitted time for a defrost.
Factory setting: 10M, range: 3M – 20M
BETW. 2 DEFR
Indicates minimum time between two defrosts.
Factory setting: 45M, range: 20M – 60M
MIN RAD STMP
Lowest permitted supply temperature on the heating circuit during defrost before electrical
auxiliary heater starts.
Factory setting: 20°C, range: 16°C – 30°C
FAN START
The fan starts when the temperature on refrigerant sensor 1 reaches the set value. If FAN
START is set to ON, the fans starts and stops at the same time as the compressor and the
FAN STOP parameter is inactive.
Factory setting: 10°C, range: ON, -5°C – FAN STOP -3°C
FAN STOP
The fan stops when the temperature on refrigerant sensor 1 reaches the set value.
Factory setting: 25°C, range: FAN START + 3°C – 30°C
FAN SPEED.
To control the fan speed. In AUTO mode the fan speed is controlled automatically depend-
ing on demand. At a setting between 60% – 100% the fan speed is locked in the set value.
Factory setting: AUTO, range: AUTO, 60% – 100%
FAN MAX
Fan may increase speed to set value as maximum. The value can be lowered to reduce noise
level at the cost of performance.
Factory setting: Depending on compressor size, range: 6-7V – 8-9V
DEFR HP STOP
Defrosting is initiated earlier when heat pump is stopped.
Factory setting:
, range:
, 5°C – 7°C
10.9
OPTIMUM
Parameter
Meaning
TEMP DIFF CIRC.
Desired temperature difference between supply and return line for the heating
system.
Factory setting: 8°C, range: 0°C – 15°C,
START FLOW CIRC.
Setting the speed a speed controlled circulation pump must start with.
Check using MANUAL TEST -> CIRC. PUMP which speed gives sufficient flow. This is
indicated by ”F”in the display (flow sensor closed). The start flow is maintained one
minute before control goes to speed control the circulation pump.
Factory setting: 7V, range: 3V – 10V
Installation instructions VMGFD102 – 61
