Discharging Compressor Oil - Panasonic U-8ME1E8E Service Manual

2. Discharging Compressor Oil

Discharged oil can be used for checking the condition of the system. Based on the appearance and color of the
discharged oil, a judgment can be made on whether the system is operating normally or not.
2-1. Discharging Oil from Oil Separator
Recover the refrigerant from the outdoor unit following the procedure given in "4. Recovering Refrigerant. "
-System with 1 outdoor unit
Open the balance tube valve using the flat head screw driver.
-System with 2 or more outdoor units
Close the balance tube valve of other outdoor unit.
Install hoses as indicated on the equipment and feed nitrogen gas gradually to provide pressure to the system from
the low-pressure outlet and collect oil in a pan or container. (Fig. 2)
• The low-pressure outlet port is at the Hi: side of the left side.
CAUTION
• A faulty outdoor unit may remain pressurized. The oil outlet port employs a Schrader-
Manifold gauge
Lo
Nitrogen gas
Packless valve or the like
type push-to-release valve. Be careful to avoid accidental oil release when using the port.
Low-pressure outlet port
(for ø7.94mm-dia connector)
Hi
Liquid tube service port
(for ø7.94mm-dia connector)
Container
Oil balance tube service port
(For 7.94mm-dia. connector)
8HP type
Fig. 2-a
3 - 3
2WAY SYSTEM
Outdoor Unit Repair Procedures
High-pressure outlet port
(for ø7.94mm-dia connector)
Gas tube service port
(for ø7.94mm-dia connector)
3