Airwell johnson JOAU-ZCY218-H11, Service Manual

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Electrical Control Function
Electrical Control System 89
1.3.10 Forced operation function
1.3.10.1 Enter forced operation function:
Press the touch button continually, the AC will run as below sequence:
Forced auto→Forced cooling→Off
When the machine is off, pressing the touch button will carry the machine to forced auto mode, after this, if
pressing the button once again, the machine will turn into forced cooling mode.
In forced cooling mode, pressing touch button will turn off the machine.
1.3.10.2 In forced operation mode, all general protections and remote control are available.
1.3.10.3 Operation rules:
Forced cooling mode:
The compressor runs at F2 frequency and indoor fan runs as breeze. After running for 30 minutes. the
machine will turn to auto mode as 24
℃
setting temperature.
Forced auto mode:
The action of forced auto mode is the same as normal auto mode with 24
℃
setting temperature.
1.3.10.4 When there
’s indoor unit running in forced cooling, it is the master forced cooling unit. Other indoor
units will run at forced cooling mode too and they will be the slave forced cooling units. The slave forced
cooling units cannot quit forced cooling mode until the master forced cooling unit quit, and turn to cooling
mode in low speed with 24
℃
setting temperature.
1.3.10.5 The slave forced cooling units will not be controlled by other signals.
1.3.11 Drain pump control (For Cassette)
Adopt the water-level switch to control the action of drain pump.
Main action under different condition :( every 5 seconds the system will check the water level one time)
1. When the A/C operates with cooling (including auto cooling) and forced cooling mode, the pump will start
running immediately and continuously, till stop cooling.
2. Once the water level increase and up to the control point, LED will alarm and the drain pump open and
continue checking the water level. If the water level fall down and LED disalarmed (drain pump delay close 1
minute) and operate with the last mode. Otherwise the entire system stop operating ( including the pump)
and LED remain alarming after 3 minutes.
1.3.12 Follow me
1) If the indoor PCB receives the signal which results from pressing the FOLLOW ME button on remote
controller, the buzzer will emit a sound and this indicates the follow me function is initiated. But when the
indoor PCB receives signal which sent from remote controller every 3 minutes, the buzzer will not
respond. When the unit is running with follow-me function, the PCB will control the unit according to the
temperature from follow-me signal, and the temperature collection function of room temperature sensor
will be shielded.
2) When the follow-me function is available, the PCB will not respond according to the setting temperature