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2WAY SYSTEM
Outdoor Unit Repair Procedures
3
8.
Pumping Out Refrigerant from Outdoor Unit
(7) Short-circuit the AP pin (CN24) on the outdoor unit control PCB of the unit to be repaired. Then turn ON the
outdoor unit power.
When the AP pin (CN24) is short-circuited and the power is turned ON, all solenoid
valves in the outdoor unit are forced open, allowing the refrigerant to be recovered
from all tubes which are separated by solenoid valves. If this work is not performed, it
will not be possible to recover all of the refrigerant at the refrigerant recovery device.
Be sure to perform this step.
CAUTION
NOTE
To determine the completion of refrigerant recovery, follow the instructions that came with the refrigerant recovery unit.
(8) Open both Hi- and Lo-side valves on the manifold gauge valves, and recover the refrigerant remaining in the
outdoor unit. After that, measure the amount of recovered refrigerant.
Fig. 14
Low-pressure outlet port
(for ø7.94mm-dia connector)
Liquid tube service port
(for ø7.94mm-dia connector)
High-pressure outlet port
(for ø7.94mm-dia connector)
Refrigerant
recovery
cylinder
Connect from here to
refrigerant recovery unit
Manifold gauge
Lo Hi
Measuring scale
Gas tube service port
Indoor unit
(for ø7.94mm-dia connector)
Normal outdoor unitFaulty outdoor unit
SM830253-00_欧州2way7_SM-TRSM.indb 31 16/08/26 19:25:18
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