Nibe VVM 300 Installation And Maintenance Instruction page 13

R E P L AC E D S E N S O R
1 . 0
REPLACED SENSOR
This information is displayed when sensors in FIGHTER
2020 are incorrectly installed. Indicated as 12 in channel
S1 on FIGHTER 2020.
The information disappears when the cause is remedied
and FIGHTER 2020 has been restarted. VVM 300 switches
to reduced boiler mode*.
D E F R O S T I N G T I M E
1 . 0
DEFROSTING TIME
This information is shown when defrosting in FIGHTER
2020 has failed three times in succession. Check the
temperature on the return line sensor (channel T3). If it is
below 10 °C the heat pump will not defrost. Check the
temperature on the evaporator sensor (channel T7). If it is
higher than the outdoor air temperature (channel T1) dur-
ing compressor operation the heat pump does not defrost.
Indicated as 15 in channel S1 on FIGHTER 2020.
The information disappears when the cause is remedied
and FIGHTER 2020 has been restarted. VVM 300 switches
to reduced boiler mode*.
S H O R T O P T I M E
1 . 0
S H O R T O P T I M E
This information is displayed when the operating time of
FIGHTER 2020 has been less than 2 minutes 3 times in a
row. Indicated as 16 in channel S1 on FIGHTER 2020.
The information disappears when the cause is remedied
and FIGHTER 2020 has been restarted. VVM 300 switches
to reduced boiler mode*.
PERMANENT HOT GAS
1 . 0
PERM AN ENT H OT G AS
This information is displayed when hotgas in FIGHTER
2020 exceeds 120 °C. Becomes continuous after three
repetitions within 240 minutes. Indicated as 17 in channel
S1 on FIGHTER 2020.
The information disappears when the cause is remedied
and FIGHTER 2020 has been restarted. VVM 300 switches
to reduced boiler mode*.
PHASE ERROR
1 . 0
PHASE ERROR
This information is displayed when the compressor in
FIGHTER 2020 has the incorrect direction of rotation.
Indicated as 18 in channel S1 on FIGHTER 2020. When
starting for the first time or after work in the distribution
board see "Commissioning and adjusting" – "Startup and
inspection" in FIGHTER 2020 Installation and Maintenance
Instructions.
The information disappears when the cause is remedied
and FIGHTER 2020 has been restarted. VVM 300 switches
to reduced boiler mode*.
C O M M A L A R M
1 . 0
COMM ALARM
Error text is displayed when contact between VVM 300
and FIGHTER 2020 is lost. This may be due to a wiring
short-circuit or lost power to FIGHTER 2020. The informa-
tion disappears when both VVM 300 and FIGHTER 2020
have been restarted.
NOTE! VVM 300 must be powered within 5 minutes after
FIGHTER 2020 restarts and communication between the
products is resumed. VVM 300 switches to reduced boiler
mode*.
NIBE VVM 300
User guide
Dealing with malfunctions
11