9 Maintenance notes
Econofresh kit
SMGB0137 rev.0 - 05/2021
301
9
9.4 Econofresh kit
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D A N G E R
Wear gloves to avoid injuries when handling components.
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C A U T I O N
• Clean the air filter more than once a year.
• Clean the heat exchanger unit once or more every two years.
Turn off the power supply switches before starting maintenance work and fit the appropriate safety locks and warnings.
Wait 5 minutes after turning off the power supply switches.
Clean the exchanger and/or air filter.
!
C A U T I O N
• Do not start the system without the air filter.
• Turn on the power supply after completing the maintenance work.
9.5 Collection of refrigerant to replace the indoor unit
Collection of refrigerant after replacing the indoor unit
1 Connect the gauge manifold to the gas and liquid stop valve.
2 Switch the power supply ON.
3 Enable pin 1 of DSW1 on the outdoor unit PCB for cooling
operation. Close the liquid stop valve and collect the refrigerant.
4 Carry out the following procedures immediately when the side
pressure drops and the gas stop valve indicates –0.01 MPa.
?
N O T E
Prevent the pressure from dropping below –0.01 MPa. If the pressure is
less, the compressor may be faulty.
a. Close the gas stop valve.
b. Disable pin 1 of DSW1.
5
Switch off the power supply.
Gas stop valve
Liquid
stop valve
Manifold gauge
DIP switch
(DSW1-1 ON)
