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(8) Drain Filter Filling Stone Inspection, Replenishment
Stopping only the indoor unit is extremely dangerous because the engine
may suddenly start if the customer operates the remote controller on the
indoor unit side. Before carrying out work on the inside of the outdoor unit,
make sure you turn off the power supply circuit breaker of the outdoor unit.
(However, if a system controller or other centralized control device is being
used, an abnormal communications error may be generated.) Alternatively,
perform the STOP operation for the outdoor unit.
j Inspection and replacement
Perform drain filter filling stone inspection and replacement every 5 years or 10,000 operating hours, whichever
comes first.
k Preparations
The following tools, gauges, and parts are required for doing this work. Prepare them before starting.
Name
Drain filter filling stones
Gasket
Rags
Nut driver
Oil absorbent mat
Oil absorbent tube
j Removing the drain filter A
1) Remove the drain hoses (2 hoses) that are attached to the drain filter A (Figure 1).
* Be careful of the drain discharge fluid that sometimes comes out at this stage.
2) Remove the four bolts and two nuts in drain filter A to remove the filter from the outdoor unit. (Figure 2.)
k Replenish the drain filter A filling stones
Remove the upper lid of the case and replace the old filling stones with new stones. Add stones until the case is
completely full.
* F ill the case with stones evenly taking care not to overfill the case, which could deform the upper lid, and mak-
ing sure that stone fragments get into the grooves of the case.
Figure 1 Removing the drain house
Safety Precautions
Specification
CHEMICAL
638-007-4860
638-012-6149
Across flats 10mm
623-200-4601
623-300-8660
Drain filter A
Drain
hoses
II - 17
Q'ty
Remarks
As needed Calcite 5 kg. (inside plastic bag)
For repairing
Small q'ty
10
nut
Figure 2 Removing the drain filter A
bolts
nut
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