Reference Manual; Safety Precaution - Mitsubishi Electric PUZ-SM100VKA2 Service Manual

REFERENCE MANUAL

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INDOOR UNIT SERVICE MANUAL
Model Name
PLA-SM71/100/125/140EA2
PEAD-SM50/60JA(L)
PEAD-SM71/100/125/140JA(L)2

SAFETY PRECAUTION

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MEANINGS OF SYMBOLS DISPLAYED ON THE UNIT
WARNING
Read the OPERATION MANUAL carefully before operation.
Service personnel are required to carefully read the OPERATION MANUAL and INSTALLATION MANUAL before operation.
Further information is available in the OPERATION MANUAL, INSTALLATION MANUAL, and the like.
2-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to terminal, all supply circuits must be disconnected.
2-2. CAUTIONS RELATED TO NEW REFRIGERANT
Cautions for units utilizing refrigerant R32
Preparation before the repair service
• Prepare the proper tools.
• Prepare the proper protectors.
• Provide adequate ventilation.
• After stopping the operation of the air conditioner, turn
off the power-supply breaker.
• Discharge the condenser before the work involving the
electric parts.
Use new refrigerant pipes.
In case of using the existing pipes for R22, be careful
with the following.
· Be sure to clean the pipes and make sure that the
insides of the pipes are clean.
· Change flare nut to the one provided with this product.
Use a newly flared pipe.
· Avoid using thin pipes.
OCH774A
Service Ref.
PLA-SM71/100/125/140EA2.UK
PEAD-SM50/60JA(L).UK
PEAD-SM71/100/125/140JA(L)2.UK
PEAD-SM50/60JA(L).TH
PEAD-SM71/100/125/140JA(L)2.TH
This mark is for R32 refrigerant only. Refrigerant type is written on nameplate of outdoor unit.
Precautions during the repair service
• Do not perform the work involving the electric parts
with wet hands.
• Do not pour water into the electric parts.
• Do not touch the refrigerant.
• Do not touch the hot or cold areas in the refrigerating
cycle.
• When the repair or the inspection of the circuit needs
to be done without turning off the power, exercise great
caution not to touch the live parts.
• When opening or closing the valve below freezing
temperatures, refrigerant may spurt out from the gap
between the valve stem and the valve body, resulting in
injuries.
Use a vacuum pump with a reverse flow check
valve.
Vacuum pump oil may flow back into refrigerant cycle
and that can cause deterioration of refrigerant oil, etc.
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Service Manual No.
Parts Catalog No.
OCH784
OCB784
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BWE021470
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BWE022250