MICRO-AIR Artic Air 24 Guía de instalación descargar pdf (Pagina 57)

Low pressure cut-out

Fifth, the Low-Pressure (L-P) Cut-Out will shut down the system if the pressure falls below 5

psi. This can happen if refrigerant is lost due to a leak or if the system has run long enough to

pull the plates so cold that the gas pressure falls below the shutdown point. If the system is out

of gas, it won’t cool the plates. If there is still refrigerant in the system, when the pressure rises

above 20 psi, the low pressure cutout will reset and the system can restart.

Temp sensor on motor controller heat sink

Sixth, there is a temp sensor on the motor controller heat sink that will shut the system down if

the temperature rises too high. The most likely cause is poor ventilation of the space where the

condensing unit is installed. Ensure that the temperature of this space remains below 130

degrees F (55 C).

Temp sensor on compressor

Seventh, this sensor will shut the system down if the compressor temperature rises to unsafe

levels.

Locked rotor shutdown software

Eighth, if the compressor is unable to start due to lack of motor rotor sync on startup it will

keep trying several times with a characteristic rising “chirp” sound, before giving up.

Low voltage cutout

Finally, if the house battery voltage drops below a minimum value, the motor controller will

shut the system down. This will save your battery bank from being totally drained. If you

experience repeated failure to start when the controls are calling for cooling, check your house

bank voltage, and for voltage drop on startup, measured at the condensing unit power terminals.

High resistance in the power cable runs can also cause this to occur.

Shorted circuit on compressor

If the compressor attempts to start but shuts off and finally gives up after several attempts,

there could be a short in the compressor wiring. There are three connectors at the top of the

purple compressor. If one of the wires has cut into the insulation of another, the insulation needs

to be repaired.

Swap-Out and RMA approval

If the troubleshooting procedures above do not resolve the issues, then contact your Glacier

Bay, Inc. representative.

The procedure to swap out the condensing unit is to first close off the ball valves at the foot of

the condensing unit to isolate the system. Then close both rotalocks to isolate the condensing

unit. Then desolder the tubes in between and remove the condensing unit. Contact your Glacier

Bay, Inc. representative for more information to receive an RMA (return materials authorization) if

a swap out is necessary .

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MICRO-AIR Artic Air 24 Guía de instalación Pagina 57