Fedders R407C service manual XIII. Self Test, XIV. Memory Backup of Settings

XIII. Self Test

Main PCB Self-test

To initiate the self-test sequence, execute the following:

a)Turn on the ac. supply to the air-con.

b)Press and hold the Operation / Filter reset button for 6 seconds after which you can hear 2 beep sound to indicate activation of self-test sequence.

(Note : When press and hold for 3 seconds, a single beep will be heard. Keep on holding for another 3 seconds to achieve the total 6 seconds requirement to activate the self-test sequence.)

Observe the following events.

iall output devices are turned off

iiEEPROM is tested. If EEPROM is faulty, buzzer will sound for 3s

iiigreen, yellow & red LEDs are turned on.

iv1s later, the 4-way valve is turned on (applicable on Heat Pump Unit only)

v1s later, compressor is turned on

vi1s later, outdoor fan is turned on

vii1s later, indoor fan runs at low speed for 3s

viiiFollowing, the indoor fan runs at medium speed for 3s

ixFollowing, the indoor fan runs at high speed

x3s later, the vane moves to down position, taking 3.42s & stays for 2s

xiThe vane moves to home position, taking 1.47s and stays for 2s

xiiThe vane moves to middle position, taking 1.39s and stays for 2s

xiiiThe vane moves to angle position, taking 0.565s & stays for 2s.

xivThe vane moves to home position again, takes 1.96s & stays for 2s.

xvAll output devices are turned OFF.

For normal operation, power off the system and turn on the system again to cause a power on reset.

XIV. Memory Backup of Settings

Once the setting of the unit changed, it will be stored into the EEPROM immediately. After current restoration due to power source supply breakdown, the unit commences operation using all the settings at the time of the breakdown. However, all timing related fuction will be invalid. The unit will be randomly start with 3 minutes delay for compressor protection.

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