Hitachi UTOPIA RAS-4HVRP2E Service Manual page 308

10 Troubleshooting
Troubleshooting in check mode
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Capacity table for the outdoor units
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Capacity table for the indoor units
Indication
3
5
6
8
10
11
13
14

Cause of indoor unit stoppage
?
N O T E
Depends on models some causes are not applicable.
Code
Operation OFF, Power OFF
0
Thermo-OFF
1
Alarm (Not always indicated)
2
Freeze Protection, Overheating Protection
3
Instantaneous Power Failure at Outdoor Unit
5
Instantaneous Power Failure at Indoor Unit
6
Stoppage of Cooling Operation due to High/Low
Outdoor Air Temperature Stoppage of Heating
7
Operation due to High Outdoor Air Temperature
Demand Enforced Stoppage
10
Retry due to Pressure Ratio Decrease
11
Retry due to Low Pressure Increase
12
Retry due to High Pressure Increase
13
Retry due to Discharge Gas Temperature
15
Increase, Retry due to Low Pressure Decrease
306 SMGB0136 rev.0 - 07/2021
Indication Capacity (kW)
32
40
48
Capacity Horsepower
(kW) (HP)
1.1 0.4
1.8 0.6
2.2 0.8
2.8 1.0
3.6 1.3
4.0 1.5
4.5 1.8
5.0 2.0
Cause Code
33-34
Horsepower (HP)
12.1 4.0
14.0 5.0
15.5 6.0
Capacity
Indication
( kW)
16 5.6
18 6.3
20 7.1
22 8.0
26 9.0
32 11.2
40 14.0
48 16.0
Retry due to Decrease of Discharge Gas Superheat
16
Retry due to inverter tripping
17
Retry due to voltage decrease / Increase, other retry of inverter
18
Expansion Valve Opening Difference Protection
19
Forced Thermo-OFF for Oil Return
21
Enforced Thermo-OFF for Hot Start Control at Crankcase
22
Heater Preheating
Retry due to High Pressure Decrease
26
Stoppage due to Outlet Temperature Decrease in Cooling
28
Stoppage of Thermo-OFF by Motion Sensor
Retry due to abnormal operating mode (4-way valve switching
35
failure)
Retry after Defrosting Operation
36
Stoppage of Thermo-OFF due to Power Saving Control
39
Stoppage of Thermo-OFF due to Outdoor unit Control
41
Horsepower
(HP)
2.3
2.5
2.8
3.0
3.3
4.0
5.0
6.0
Cause