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Features of Refrigerant (R600a)
• Achromatic and odor less gas.
• Flammable gas and ignition (explosion) at 494 Degree Celsius.
• Upper/ lower explosion limit: 1.8%~8.4%/Vol.
Features of R600a Refrigerator
• Charging of 60% refrigerant compared with a R134a model.
• The suction pressure is below 1bar (absolute) during the operation.
• Because of its low suction pressure, the external air may flow in the
cycle system when the refrigerant leak, and it causes malfunction in
the compressor.
• The displacement of compressor using R600a must be at least 1.7
times larger than that of R134a.
• XH-9 type dryer is applicable for this product.
• The compressor has a label of refrigerant R600a.
• Only SVC man must have an access to the system.
SERVICE PRECAUTIONS
RELAY ADJUSTMENT
PTC-RELAY
MOTOR RESTARTING & PTC COOLING
(1) For restarting after power off during normal Compressor Motor operation, plug the
power cord after 5 min. for pressure balance of Refrigerating Cycle and PTC cooling.
(2) During normal operation of the Compressor Motor, PTC elements generate heat
continuously. Therefore, if PTC isn't cooled for a while after the power has been shut
off, Motor can't operate again.
RELATION BETWEEN OLP & PTC RELAY
• If the power is off during operation of Compressor and the power is on before the
PTC is cooled, (instant shutoff within 2 min. or reconnect a power plug due to
disconnecting), the PTC isn't cooled and a resistance value grows. As a result, current
can't flow to the sub-coil and the Motor can't operate and the OLP operates by flowing
over current in only in the main-coil.
• While the OLP repeats on and off operation about 3-5 times, PTC is cooled and
Compressor Motor performs normal operation. If OLP doesn't operate when PTC is
not cooled, Compressor Motor is worn away and causes short circuit and fire.
Therefore, use a properly fixed OLP without fail.
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