Sinclair SDV5 Series Service Manual page 71

2.23.9 L2 : Procedure
Voltage of power supply is 166-265V?
Replace outdoor main PCB
2.23.10 Compressor replacement procedure
Step 1: Remove faulty compressor and remove oil
 Remove the faulty compressor from the outdoor unit.
 Before removing the oil, shake the compressor so as to not allow
impurities to remain settled at the bottom.
 Drain the oil out of the compressor and retain it for inspection.
Normally the oil can be drained out from the compressor discharge
pipe.
Step 2: Inspect oil from faulty compressor
 The oil should be clear and transparent. Slightly yellow oil is not an indication of any problems. However, if the oil is
dark, black or contains impurities, the system has problems and the oil needs to be changed. Refer to Figure 6-2.7 for
further details regarding inspecting compressor oil. (If the compressor oil has been spoiled, the compressor will not
be being lubricated effectively. The scroll plate, crankshaft and bearings will wear. Abrasion will lead to a larger load
and higher current. More electric energy will get dissipated as heat and the temperature of the motor will become
increasingly high. Finally, compressor damage or burnout will result.)
Step 3: Check oil in other compressors in the system
 If the oil drained from the faulty compressor is clean, go to Step 6.
 If the oil drained from the faulty compressor is spoiled (lightly or heavily), go to Step 4.
Step 4: Replace oil separator and accumulator
 If the oil from a compressor is spoiled (lightly or heavily), drain the oil from the oil separator and accumulator in that
unit and then replace them.
Step 5: Check filters(s)
 If the oil from a compressor is spoiled (lightly or heavily), check the filter between the gas stop valve and the 4-way
valve in that unit. If it is blocked, clean with nitrogen or replace.
70
L2
No
Provide normal power supply
Figure 6-2.5: Draining oil from a compressor