ESIE16-02B
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Part 4. Maintenance
4.2. Outdoor unit
Page 90
4/04/17
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Version 1.1
RA R32 Split & multi split M-Series
4.2. Outdoor unit
4.2.1. General maintenance outdoor unit
1. Outdoor unit coil
- Straighten
hair
fins.
-
Clear coil from dust, leaves, etc. with a fin-comb, or compressed air/N2. Avoid bending or damaging of the Alu fins during
the cleaning process.
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.
C
AUTION
Make sure not to bend the hair fins.
COOLING
Low pressure
High pressure
Running current
Dirty air filter
Higher
Higher
Higher
Short circuit of air inlet/outlet
Higher
Higher
Higher
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
