York YJHMXH007BARR-FX, Service Manual

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Functions and control
Domestic Air Conditioner
5.1.16 Single indoor system operation
* Enter condition: First, set the high speed airflow and 30 centigrade set temperature, then press the
dormant keys for 6 times within 7 seconds, the system will feedback with 6 rings.
* After the system enters the separate indoor system operation mode, the indoor system will operate
according to the set mode and neglect the communication signals of the outdoor system. However, it
has to send signals to the outdoor system.
* Quitting condition: This mode can be quitted after receiving the quitting signal from the remote
control or urgency system. The indoor system thus can quit the single operation mode.
5.1.17 Power cut compensation
* Entering condition: Press dormant button 10 times within 7 second, the buzzer will ring 4 times and
the present system status will be stored into the EEPROM of the indoor system.
* After entering the power cut compensation mode, the processing of the indoor system should be as
the followings:
Remote control urgency signal: operate according to the remote control and the urgent conditions,
the present status will be stored into the EEPROM of the indoor system.
* Quitting conditions: Press dormant button 10 times within 7 seconds and the buzzer will ring twice.
5.1.18 Fixed frequency operation
1. Fixed cooling: a. under G code condition: high speed cooling, set 16 ć , press temperature ‘-‘ key
and the set key at the same time. The system will enter the fixed frequency operation after the buzzer
rings twice.
b. The proceeding programs are as the follows:
Entering the fixed frequency operation, you can set the fixed strength location 1 and send the cooling
signal to the outdoor system. Meanwhile, you can fix the indoor system at high speed mode, the
location of the airflow direction board can be switched to the maximal position.
c. Quitting condition: The fixed frequency cooling can be quitted after receiving the remote signal, and
the system will enter the remote setting status.
2. Fixed heating: a. under G code condition: high speed heating, set 30 ć , press temperature ‘+‘ key
and the set key at the same time. The system will enter the fixed frequency operation after the buzzer
rings twice.
b. The proceeding programs are as the follows:
Entering the fixed frequency operation, you can set the fixed strength location 1 and send the heating
signal to the outdoor system. Meanwhile, you can fix the indoor system at high speed mode, the
location of the airflow direction board can be switched to the maximal position.
c. Quitting condition: The fixed frequency heating can be quitted after receiving the remote signal, and
the system will enter the remote setting status.
5.1.19 Test program
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