Webasto BCT010300C Repair Manual download pdf (Page 29)

Troubleshooting – Refrigerant Compressor

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• Never reset a breaker or replace a fuse

without first checking for a ground fault (a

short circuit to ground).

An open fuse or tripped circuit breaker is a strong

indication of a ground fault. To check for a ground

fault, use the procedure outlined in “Identifying

Compressor Electrical Problems” on page 31.

• Be alert for sounds of arcing (sizzling,

sputtering or popping) inside the compressor.

If you hear these sounds, IMMEDIATELY move

away from the area of the compressor.

• Disconnect power before servicing.

Always disconnect power before servicing, unless

it is required for a specific troubleshooting

technique. In these situations, use extreme

caution to avoid electric shock.

Figure 31. Compressor with protective cover (1) held in

place by a hex-nut (2)

Figure 32. Thermal protection (3) and hermetically sealed

terminals (4) shown with protective cover

removed.

6.2.6 Refrigerants and Other Chemicals

Contact with refrigerant, mixtures of refrigerant and oil,

or other chemicals can cause a variety of injuries

including burns and frostbite. For example, if refrigerant

contacts skin or eyes it can cause severe frostbite. Also,

in the event of a compressor motor failure, some

refrigerant and oil mixtures can be acidic and cause

chemical burns.

To avoid injury, wear appropriate protective eye wear,

gloves, and clothing when servicing an air conditioning

or refrigeration system. Refer to your refrigerant supplier

for more information.

If refrigerant or mixtures of refrigerant and oil come in

contact with skin or eyes, flush the exposed area with

water and get medical attention immediately.

6.2.7 Compressor Removal

Failure to properly remove the compressor can result in

serious injury or death from electrocution, fire or sudden

release of refrigerant and oil.

Follow these precautions when removing a compressor

from a system:

• Disconnect ALL electrical power.

Disconnect all electrical power supplies to the

system, making sure that all power legs are open.

(NOTE: The system may have more than one

power supply.)

• Be sure refrigerant is recovered using the

appropriate equipment before removing

compressor.

Attempting to remove the compressor before

removing all refrigerant from the system can cause

a sudden release of refrigerant and oil.

Among other things, this can:

• Cause a variety of injuries including burns and

frost bite.

• Expose service personnel to toxic gas.

To avoid serious injury or death, be sure to remove and

recover all refrigerant before removing the compressor.

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Webasto BCT010300C Repair Manual Page 29

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