Airwell AWAU-YDV1010-H13, Service Manual

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(Note 1)The general standard for temperature difference between inlet and outlet air
In "cooling" operation, it is normal that the dry bulb temperature difference between inlet air and outlet air of the
air conditioner is over 10°C (at the maximum frequency) after 30 minutes at least.
In "heating" operation, it is normal that the dry bulb temperature difference between inlet air and outlet air of the
air conditioner is over 14°C (at the maximum frequency) after 30 minutes at least.
(Note 2) General standard for operating current
It is normal that the current in either cooling/heating operation mode is within ±15% of the calibrated current.
The value of current may have the following differences due to different operation conditions: When higher than
the standard value of the current: the temperature of indoor and outdoor is high; heat dissipation of outdoor
unit is poor. When lower than the standard value of the current: the temperature of indoor and outdoor is low;
refrigerant gas leaks (insufficient refrigerant).
(Note 3) General standard for operating pressure
Cooling
(at the maximum frequency)
High pressure 2.0~3.8 MPa Indoor 18-32°C Outdoor
25-35°C
Low pressure 0.6~1.0 MPa
Heating
(at the maximum frequency)
High pressure 2.2~3.0 MPa Indoor 15-25°C Outdoor
5-10°C
Low pressure 0.3~0.8 MPa
Values after 15-minute operation (the temperature therein refers to dry bulb temperature with unit of °C)
The transformation trend of high pressure and low pressure due to change of operation condition
Refrigeration/heating: indoor temperature rises – high/low pressure rises
Indoor temperature drops – high/low pressure drops
Outdoor temperature rises – high/low pressure rises
Outdoor temperature drops – high/low pressure drops
Evaluating unit through test device
Operation
Begin to operate the system whose complete setting has been
confirmed.
Operating methods:
1. Switch the BM1, BM2 to OFF , search the indoor units and
outdoor unit to check if the number of indoor units are right.
2. Switch the SW9, SW10, SW11 to 0, 13, 2 respectively, then
press SW2 for 2 seconds, the digital display tube will display
“1111” and indoor unit will enter into cooling operation; or switch
SW9, SW10, SW11 to 0, 14, 2 respectively, then press SW2 for 2
seconds, the digital display tube will display “1111”, indoor unit will
turn on automatically and enter into heating operation. Frequency
of compressor is controlled by low pressure control for cooling,
and high pressure control for heating.