Haier HSU-12HS03/R2DB, HSU-09HS03/R2DB service manual Indoor Unit Part

Domestic Air Conditioner	HSU-12HS03/R2(DB)
	Model: HSU-09HS03/R2(DB)

INDOOR UNIT PART

1. Application Range

This function guide can be used for the HSU-09HS03/R2(DB) air-conditioners and other frequency-convertings made by Headquarters of Qingdao Haier Air-conditioner Co.,Ltd

Indexes in this guide (symblised by parameters) refer to the indexes stored in the EEPROM. Please refer to the EEPROM index chart.

2. Temperature Ajusting function

. This function will decide the outdoor-set’s running speed according to the domestic temperature and the set temperature.

. Control the domestic blower fan according to the need for temperature adjusting when the wind rate is automatic

. Control the domestic blower fan according to the disc-tube temperature when it’s running for heating.

2.1.1 Indoor environment temperature sensor specification

Under the conditions of short circuit or open circuit, the indicative light will flash an alarm and the indoor blower fan stops. When it returns to normal condtions, the operation will come back to normal.

Short circuit

Temperature: over 126℃. Sixteen scales: over F8H. Resistance value: below 0.65 K.

Voltage: over 4.85 V Normal temperature

Temperature: 25 ℃. Sixteen scale: 40H Resistance value: 23K . Voltage: 2.33 V Disconnection

Temperature : below minus 31 ℃. Sixteen scale: below 08H . Resistance value:

below 620K. Voltage: below 0.15 V

.B index=4200 R(25℃)=23K

2.1.2During the time when the heat running starts and indoor blower fan stops or when the warm boot starts and within 30 seconds after the indoor blower fan starts, the resistance value for indoor environment temperature sensor will be neglected. 2.2 The frequency kept when the frequency rises.

. When the operation enters into the work mode, in order to insure the full oil-returning, some frequency should be kept for some time.

	Indication time		Indication
			frequency
Cooling & moisture	Heating	Heating	Frequency kept
removing		& Frost removing
60 seconds	60 seconds	30 seconds	58 Hz

When the unit is switched on and the forcible running is over, the temperature level control starts.

2.3 Modify the set temperature

The set temperature can be modified according to the unit’s operation mode, wind volume or whether it is under forceful running condition.

The modification of wind volume is only limited within the switch between weak

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