GB / 17
(*) BUS power supply overload
A BUS power supply overload error may occur due to the connection of three or more devices within the
installed system. Devices which may overload the BUS network include:
- Multizone module
- Solar pump assembly
- Module for instant production of domestic hot water
To avoid overloading the BUS power supply, set microswitch 1 on one of the P.C.B.s inside the equipment
connected to the system (except the Tank) to OFF, as illustrated in the figure.
1
ON
OFF
2
microswitch
EXTERNAL UNIT ERROR LIST
DESCRIPTION
RESET
HP POWER OFF
SERVICE RESET
905 Compressor control error x
Errore pilotaggio valvola 4 vie
908 HP EXV Mismatch Error x
909 HP Zero Fan Speed x
947 HP V4W Error Service x
912 HP V4W Error Service x
948 HP TD Error -- --
949 HP TS Error -- --
911 HP TE Error -- --
952 HP TO Error -- --
913 HP LWT Error -- --
914 HP TR Error -- --
916 HP TEO Error -- --
915 TDM communication error -- --
953 HP Compressor Heater Mismatch -- --
954 HP Base Panel Heater Mismatch -- --
956 HP Compressor model mismatch -- --
957 HP Fan model mismatch -- --
Excessively low SST error
917 HP Freeze Service -- x
951 HP HIGH TD Error x
950 HP HIGH TD Service -- x
919 HP HIGH SDT Error x
960 HP EWT Error -- --
931 Inverter Error* -- --
962 Defrost Energy x --
* par. 12.13.1 shows the inverter error according to the tablee
«Inverter error list» byside.
ERROR
INVERTER
DESCRIPTION 1ph 3ph
1 Heat Sink-Overheat x x
2 Compressor Ipm Over-Current x
3 Compressor Fail To Drive x
4 Compressor Over-Current x x
5 Input Voltage Lack Of Phase x
6 Compressor Ipm Current Sampling Failure x
7
Compressor Drive Capacitors Precharge
Failure
x
8 Dc Bus Over-Voltage x
9 Dc Bus Under-Voltage x
10 Ac Input Under-Voltage x
11 Ac Input Over-Current x
12 Ac Input Voltage Sampling Failure x
13 Dsp&Pfc Communication Error x
14 Heat Sink Sensor Error x
15 Dsp&Mcu Communication Error x
16 Abnormal Communication With Main Board x
17 Ipm Module Over-Heat x
18 Compressor model fault x x
19 High Pressure Protection x x
21 Fan1 Fail To Drive x
27 Fan1 Over-Current x
29 Fan1 1ph Error x
35 High pressure switch protection x x
36 Ow pressure switch protection x x
37 Klixon protection x x
38 Inter-boards communication error x
39 IPM over current x
40 Fail to drive the compressor x
41 Compressor over current x
42 IPM current sampling failure x
43 Heat-sink over-heat x
44 Fail to Precharge x
45 DC bus over voltage x
46 DC bus under voltage x
47 AC input under-voltage x
48 AC input over-current x
49 compressor emergency stop x
50 AC input voltage sampling fault x
51 Heat-sink sensor error x
52 DSP & MCU communication error x
53
Abnormal communication with IDU control
board
x
INVERTER ERROR LIST