Hitachi PC-ARFG-E Installation & Operation Manual page 97

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Stopping cause state indication
16 Stopping cause state indication
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Cause of Stoppage
Code
01 Operation OFF, Power OFF
02 Thermo-OFF
03 Alarm*1
04 Freeze Protection, Overheating Protection
05 Instantaneous Power Failure at Outdoor Unit/Reset*2
06 Instantaneous Power Failure at Indoor Unit/Reset*3
07 Stoppage of Cooling Operation due to Low Outdoor Air Temp. Stoppage of Heating Operation due to High Outdoor Air Temp.
09 Stoppage of Reversing Valve Switching Control
10 Demand Enforced Stoppage
11 Retry due to Pressure Ratio Decrease
12 Retry due to Low Pressure Increase
13 Retry due to High Pressure Increase
14 Retry due to Abnormal Current of Constant Speed Compressor
15 Retry due to Vacuum Abnormality, Discharge Gas Temp. Increase
16 Retry due to Decrease of Discharge Gas Superheat
17 Retry due to Inverter Tripping
18 Retry due to Voltage Decrease, Other Retry of Inverter
19 Expansion Valve Opening Change Protection
20 Operation Mode Difference between IDU and ODU/ Stoppage of Operation Mode Switching during Operation
21 Enforced Thermo-OFF*4
22 Enforced Thermo-OFF (Hot Start Control at Crankcase Heater Preheating)
23 Enforced Stoppage of compressor due to DIP switch (DSW) Setting
24 Thermo-OFF during Energy-Saving Operation
26 Retry due to High Pressure Decrease
27 Retry due to Operation of Outdoor Blower Protector
28 Stoppage due to Outlet Temp. Decrease in Cooling
29 Retry due to Abnormal Current during MS Motor Synchronous Operation
30 Stoppage of Thermo-OFF due to Compressor Excepting
32 Retry due to Abnormal Transmission of Outdoor Unit
33 Enforced Thermo-OFF due to Enforced Cleaning Operation
34 Stoppage of Thermo-OFF by Motion Sensor
35 Retry due to Abnormal Refrigeration Cycle
36 Retry after Defrosting Operation
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N O T E
• *1 Even if stoppage Alarm "02" is not always indicated. If the unit is thermo-OFF due to another cause of stoppage prior to alarm occurrence, the
code of the cause remains.
• *2 The outdoor unit equipped with an inverter resets ODU Micro-Computer if the transmission between inverter PCB and outdoor unit PCB is
interrupted for 30 seconds. Therefore, the stoppage cause code when Alarm 04 occurs may be "05".
• *3 IDU Micro-Computer is reset if the transmission between the indoor unit and the outdoor unit is interrupted for 3 minutes. Therefore, the
stoppage cause code when Alarm 03 occurs may be "06".
• *4 If the stoppage cause code "21" is indicated on the indoor unit of twin, triple, or quad, check the stoppage cause of other indoor unit numbers.
83 PMML0565 rev.1 - 04/2022
d1 01
Refer to "Cause of Indoor Unit Stoppage"
Cause