Hitachi RAS-4.5HNBRKQ1 - Troubleshooting Using Alarm Codes

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2.2 Troubleshooting Using Alarm Codes
Alarm
Code
01
Activation of Protection Device (Float Switch) in Indoor Unit
●
The alarm code is ashed on the 7-segment display of the outdoor unit.
●
The alarm code is displayed on the wired controller of the indoor unit.
★
Example of 4-way Cassette Type
This alarm code is displayed when the contact between #1 and #2 of CN14 on the I.U. PCB is opened for
more than 120 seconds during the cooling, dry, fan, or heating operation.
I.U. PCB: Indoor Unit PCB
Alarm
Code
02
Activation of Protection Device (High Pressure Switch) in Outdoor Unit
● The alarm code is ashed on the 7-segment display of the outdoor unit.
● The alarm code is displayed on the wired controller of the indoor unit.
TROUBLESHOOTING