Part 4. Maintenance; Indoor Unit; General Maintenance - Daikin FTXJ-M Service Manual

ESIE16-02K |

Part 4. Maintenance

This part contains the following chapters:

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

Outdoor unit..........................................................................................................................................................................................91
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.
3. Clean the indoor heat exchanger (if necessary. Example: contaminated by cooking oil, ...).
- Use proper field supply cleaning agent which is suitable for cleaning heat exchangers and drain pans.
- Clearly follow the instructions of local supply cleaning agent and do not use household cleaning agents.
- Please rinse the heat exchanger and drain pan with water after the cleaning process. (*)
C
AUTION
* Rinse out the cleaning agent until there is no cleaning agent left. Otherwise, the corrosion of heat exchanger
and drain pan may occur.
Pay attention to the cleaning agent that may also corrode other materials of indoor unit (Aluminium, copper, plas-
tic, ABS, ...).
31/05/21 | 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