Hitachi PC-ARF Technical Catalogue page 166

4 Individual remote controls
PC-ART
Step
No.
14 Cause of the stoppage.
00
01
02
03
Instantaneous power failure in the outdoor unit, reset (see bottom note section, point 3) ).
05
Instantaneous power failure in the indoor unit, reset (see bottom note section, point 4) ).
06
Cooling process stopped due to a low outdoor temperature, heating process stopped due to a high outdoor
07
08
09
10
11
12
13
14
Retry due to abnormal high temperature of the discharge gas, excessively low suction pressure.
15
16
17
18
19
20
21
22
24
N O T E
1. Explanation of terms:
• Thermostat on: A condition where the indoor unit requests compressor activation.
• Thermostat off: A condition where the indoor unit does not request compressor activation.
2. Although the stoppage is caused by an "alarm", it does not always indicate "02".
3. If the transmission between the control printed circuit boards of the inverter and the control is not made within 30 seconds, a stoppage
will occur due to cause d1-05 and alarm code "04" may be displayed.
4. If the transmission between the indoor and outdoor units is not made within 3 minutes, the indoor units will stop. In this case, the
stoppage is due to cause d1-06 and alarm code "03" may be displayed.
5. The FSN system will read 20 when different modes are selected for indoor units.
150
TCGB0106 rev.0 - 12/2014
Unit stoppage cause indication
Codes:
Operation stopped, power switched off.
Thermostat switched off (see bottom section point 1).
Alarm (see bottom note section point 2).
Freeze protection, overheating protection
temperature.
Compressor quantity changeover, stoppage.
4-way valve changeover stoppage request (FX only).
Stoppage request, forced stoppage.
Retry due pressure rate reduction.
Retry due to increased low pressure.
Retry due increased high pressure.
Retry due to abnormal current in the constant speed compressor.
Retry due to reduced overheating of the discharge gas.
Retry due to inverter disconnection.
Retry due to voltage reduction.
Expansion valve opening change protection.
Indoor unit operation mode changeover (see bottom note section point 5).
Forced thermostat deactivation when deactivated on another indoor unit.
Hot-start after 4 hours with outdoor unit on.
Thermostat off during energy-saving mode.
d1 01