Constant temperature and humidity test chamber two compressor refrigeration common fault solutions

1, the primary refrigeration compressor is not running: (1) the working voltage is too low; Blocking of switching power supply; The transmission line head fell
.

Check the operating voltage of the switching power supply and the connector of the transmission line
.

Application enterprise technicians solve
.

(2) The refrigeration compressor power switch is in the OFF part; The dashboard set point is too high
.

Check the power switch and set point, apply the enterprise technician to undertake the solution
.

(3) The refrigeration compressor start relay is not working
.

Inspection of refrigeration compressors
.

The upper device assumes the solution
.

(4) Common failures and dismantling
of refrigeration compressors.

The upper device assumes the solution
.

2.
Primary refrigeration compressor operation
.

Secondary refrigeration compressor does not run: (1) the common failure of the primary refrigeration unit, for the refrigerant less, etc.
, check whether the temperature of the refrigeration machine is specified
.

The upper device assumes the solution
.

(2) Common faults of secondary automotive relays and control boards
.

Check the car relays and control boards, and disassemble and replace
them if they are broken.

The upper device assumes the solution
.

(3) Refrigeration compressor to start relays or capacitors common faults, dismantling
.

The upper device assumes the solution
.

(4) Common failures and dismantling
of refrigeration compressors.

The upper device assumes the solution
.

(5) The basic parameters of the temperature controller are incorrect and adjusted
again.

Application enterprise technicians undertake the solution
.

3.
Primary refrigeration compressor operation
.

The secondary refrigeration compressor wants to run, but cannot run: (1) When the secondary operation enters the low working voltage, the working voltage
is determined.

Application enterprise technicians undertake the solution
.

(2) The secondary equilibrium working pressure is too high, and the refrigeration compressor tries to restart
frequently overload.

Find ways to reduce the pressure
of balanced work.

The upper device assumes the solution
.

(3) Start the relay or capacitor common fault, disassembly
.

The upper device assumes the solution
.

4, the operation of the primary refrigeration compressor, the secondary refrigeration compressor often does not reach the set temperature: (1) the primary or secondary refrigerant filling is small, filling and irrigating the refrigerant
.

The upper device assumes the solution
.

(2) Common faults of temperature control instruments, dismantling and replacing
.

The upper device assumes the solution
.

(3) The camera is damaged and replaced
.

The upper device assumes the solution
.

Second, constant temperature and humidity test box refrigeration unit blockage 1, first-level system software blocking: clean or replace the blocked components and capillaries, the upper device to undertake the solution
.

2.
Second-level system software blocking: clean or disassemble the blocked components and capillaries, and the upper device undertakes to solve
.

Third, constant temperature and humidity test box refrigeration unit seepage 1, the first level system software water infiltration: the first level refrigeration compressor operation, but not the refrigerator; Secondary refrigeration compressor does not run the resolution method: check the temperature of the high-temperature suction pipe, and the operation of 10min still cannot drop below 0 °C, which can determine the water
infiltration.

Hydrostatic test, leak finding
.

The upper device assumes the solution
.

2, the secondary system software water infiltration: primary refrigeration compressor operation, secondary refrigeration compressor continuous operation, but not refrigeration
.

Mode of resolution Ditto
.

Hydrostatic test, leak finding
.

The upper device assumes the solution
.