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(*) 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
ERROR TDM
DESCRIPTION
RESET
HP PO
WER OFF
SER
VICE RESET
905
Compressor control error
x
906
HP FAN Mismatch Error
x
907
Errore pilotaggio valvola 4 vie
x
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
--
--
922
Excessively low SST error
x
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
Содержание NIMBUS HYBRID MODULE NET
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