ESIE16-02B
|
Part 4. Maintenance
4.1. Indoor unit
4/04/17
|
Version 1.1
Page 89
RA R32 Split & multi split M-Series
Part 4. Maintenance
This part contains the following chapters:
4.1. Indoor unit
4.1.1. General maintenance
1. Optimal operation conditions
2. Correlation of air-conditioner's operation status, pressure and running current
* Water in the refrigerant freezes inside the electronic expansion valve and is basically the same phenomenon as pump down.
** Dirt in the refrigerant clogs filters inside the piping and is basically the same phenomenon as pump down.
*** Pressure differential between high and low pressure becomes low.
Indoor unit ............................................................................................................................................................................................89
Outdoor unit..........................................................................................................................................................................................90
W
ARNING
Before performing any maintenance, power off the unit.
I
NFORMATION
After all checks are made, make sure the water and brine circuits are filled properly again and fluid pressures are in line
with regulations (± 2 bar).
Cooling
Heating
Differential between suction temperature
and discharge temperature
8~18°C
14~30°C
DB
27°C
20°C
WB
19°C
Not applicable
COOLING
Low pressure
High pressure
Running current
Dirty air filter
Lower
Lower
Lower
Short circuit of air inlet/outlet
Lower
Lower
Lower
Air mixed in refrigerant
Higher
Higher
Higher
Water mixed in refrigerant
Lower*
Lower
Lower
Dirt mixed in refrigerant
Lower**
Lower
Lower
Refrigerant shortage (gas)
Lower
Lower
Lower
Unsatisfactory compression
Higher***
Lower
Lower