SEIFERT Variable Speed Air Conditioner KG 2025-24V - Manual (Page 19)

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6. Fault Finding
FAULT REASON SOLUTION
Air conditioner does
not start Power supply not or incorrectly connected Connect the power supply correctly
Temperature in the control cabinet is below
the target value. Wait until the temperature target value is
exceeded. The air conditioner will start by itself.
If the target value of the control cabinet
temperature is too high set a lower target value
Door contact open Close the enclosure door or bridge door contact
connections.
Air conditioner doesn’t
cool the air Compressor faulty The compressor must be
changed. This process must
be carried out by the
manufacturer.
Compressor protection switch has been
activated Check cooling capacity. If the cooling capacity is
too low at the operating conditions find another
location with lower ambient temperatures or
install an additional air conditioner
Evaporator and/or condenser are heavily
soiled or blocked The evaporator and/or compressor must be
cleaned
The cooling output of the air conditioner is
too low for the heat generated by the
components in the control cabinet Check cooling capacity. If the cooling capacity is
too low at the operating conditions find another
location with lower ambient temperatures or
install an additional air conditioner
Evaporator iced up Insufficient refrigerant due to refrigerant loss
through leaks in circuit Refrigerant circuit must be
sealed and refilled. This
process must be carried out
by the manufacturer.
The ambient temperature is far below the
lower operating limit. Place the air conditioner in an area where the
temperature remains within the operating limits
The enclosure is not sealed Seal the enclosure
Fan or fan capacitor cold side defective Replace fan and/or fan capacitor
Heavy condensation Enclosure door is not completely closed Close the door
Enclosure is not sealed Seal the enclosure
Incomplete seal at the contact surfaces
between air conditioner and enclosure Seal the contact surfaces and stiffen the
mounting surface of the enclosure if necessary
Uneven temperature
distribution in the
control cabinet Enclosure air intake and outlet blocked or
partially impeded by components inside Move components or change position of air
conditioner
Enclosure volume too large for air
conditioner Check cooling capacity. If the cooling capacity is
too low at the operating conditions find another
location with lower ambient temperatures or
install an additional air conditioner
Short circuit of the air Change the air guidance
Condenser fan does
not run Fan defective Replace fan