Part 4. Maintenance; Indoor Unit; General Maintenance - Daikin 2MXM50M Service Manual

ESIE16-02B |

Part 4. Maintenance

This part contains the following chapters:

Indoor unit ............................................................................................................................................................................................89

Outdoor unit..........................................................................................................................................................................................90
4.1. Indoor unit
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).

4.1.1. General maintenance

1. Optimal operation conditions
Differential between suction temperature
and discharge temperature
DB
WB
2. Correlation of air-conditioner's operation status, pressure and running current
COOLING
Dirty air filter
Short circuit of air inlet/outlet
Air mixed in refrigerant
Water mixed in refrigerant
Dirt mixed in refrigerant
Refrigerant shortage (gas)
Unsatisfactory compression
* 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.
4/04/17 | Version 1.1
RA R32 Split & multi split M-Series
Part 4. Maintenance
Cooling
8~18°C
27°C
19°C
Low pressure
Lower
Lower
Higher
Lower*
Lower**
Lower
Higher***
Heating
14~30°C
20°C
Not applicable
High pressure
Lower
Lower
Higher
Lower
Lower
Lower
Lower
4.1. Indoor unit
Running current
Lower
Lower
Higher
Lower
Lower
Lower
Lower
Page 89