Hitachi RUA-NP10ATS, Instruction Manual

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7
ELECTRICAL WIRING
3.3.6 Alarm Detect Function
(1) Each alarm code is composed of 2 digits for 1 set, or 4 digits for 2 sets.
(2) If the alarm code is composed of 1 set(2 digits)
：
(2) If the alarm code is composed of 2 sets(4 digits)
：
(4) If the system is operated under abnormal conditions, the alarm code will be showed as digits by the
indicator.
Alarm Code Description Check Item
—
03 Detect of CPU Error.
The CPU of PCB Self-Checking.
(no need to check the item of unit)
—
05
Reverse or Phase Lack of Main Power
Source. Check the connection of main power supply.
(Refer to Main Power Wiring Procedures)
C1
08
Overheat forCompressor1.
(Internal thermostat for compressor1 acted) Check the Internal Thermostat of
Compressor1.
C2
Overheat for Compressor2.
(Internal thermostat for compressor2 acted) Check the Internal Thermostat of
Compressor2.
—
19 Overcurrent for Indoor Fan Motor. Check the Current for Indoor Fan Motor.
—
31 No Capacity Setting of Unit.
Check the Setting of DSW1 Switch.
(Refer to Factory Setting of DIP Switch)
C1
39
Overcurrent for Compressor Motor1.
Check the Current for Compressor Motor1.
(Refer to Troubleshooting)
C2 Overcurrent for Compressor Motor2.
Check the Current for Compressor Motor2.
(Refer to Troubleshooting)