Functions and control
5.1.19 Test program
First, connect the test program terminal on the PCB. Then connect the system to the power circuit. The test
program will operate as follows.
HV series display: The buzzer rings for one time—the signal will be sent to outdoor system for 0.5 second—
the violet is sent for 0.5-- the background light turns to white—the back ground light turns to white—the
background light turns to white—the background light is fully lighted for 0.5 second—LED screen lights for
0.5 second— the step-in motor fully output for 0.5 second—then the motor doesn’t output for 0.5
second—the motor fully output again for 0.5 second. The test program finishes.
5.1.20 Time cutting function:
Connect the test program terminal on the PCB after connecting the system to the power circuit.
The CPU of the main control will be 60 times faster.
5.2 The control system of outdoor unit
5.2.1˖The operation frequency of outdoor unit and its control
1. The operation frequency control of compressor
The operation frequency scope of compressor˖
mode Minimum operation frequency Maximum operation frequency
zH011 zH02 gnitaeh
zH09 zH02 noitaregirfer
2. The starting of compressor
When the compressor is started for the first time, it must be kept under the conditions of 58Hz,88Hz for one
minute (the overheating protection of the outdoor unit air-blowing temperature, immediately decrease the
frequency when the compressor is overflowing and releasing the pressure)ˈthen it can be operated towards
the target frequency. When the machine runs normally, there’s no such process. After starting the
compressor for operation, the compressor should run according to the calculated frequency, and every
determined frequency for protection should be prior to the calculated frequency.
3. The speeds of increasing or decreasing the frequency of the compressor
The speed of increasing or decreasing the frequency rapidly 1 -----------1HZ/second
The speed of increasing or decreasing the frequency slowly
2 -----------1HZ/10seconds
4
. The calculation of the compressor’s frequency
1˅The minimum/maximum frequency limitation
AˊWhile refrigerating: F-MAX-r is the maximum operation frequency of the compressor; F-MIN-r is the
minimum operation frequency of the compressor.
BˊWhile heating: F-MAX-d is the maximum operation frequency of the compressor; F-MIN-d is the minimum
Domestic air conditioner
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