Hitachi UTOPIA RAS-4HVRP2E - Page 309

10 Troubleshooting
Troubleshooting in check mode
SMGB0136 rev.0 - 07/2021
307
10
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Cause of inverter stoppage (check the item)
Code Cause
1
Driver IC Error Signal Detection
2
Instantaneous Overcurrent
3
Inverterntemperatureincrease
4
Electronic Thermal Protection (Inverter
Overcurrent)
5
Inverter voltage decrease
6
Inverter voltage increase
7
Abnormal Inverter transmission
8
Abnormal current sensor
9
Instantaneous Power Failure Detection
11
Microcomputer reset
12
Earth fault detection
13
Open-Phase Detection
16
Inverter failure
17
Abnormal Control
18
Forced stoppage by high pressure detection
19
Abnormality of picking up circuit for protection
20
Early returns protective device
Code Cause
21
Abnormal compressor motor (Step-out)
22
Abnormal combination of PCB
23
EPROM error
24
Abnormal compressor frequency
25
Beyond frequency scope
26
DC BUS Pre-charge malfunction
30
Phase default of compressor inverter output
32
Overcurrent of L1 reactor
33
Overcurrent of L2 reactor
34
Overcurrent of compressor inverter input
35
Overload of compressor inverter input
38
Error of IPM temperature sensor
40
Abnormal MCU RAM
41
Abnormal MCU register
42
Abnormal MCU timer
43
AbnormalMCUash
44
Abnormal reference voltage
45
Abnormal software protection module
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Normal Operation Condition
Discharge pressure 3.6 Mpa or less
Suctions pressure 0.15 to 1.3MPa
Discharge temperature 110ºC or Less
Heat exchanger liquid piping temperature at heating mode -12 to +15ºC