Inspecting The Compressor - Daikin GYEQ20AN Service Manual

Inspecting the Outdoor Unit

1.23 Inspecting the Compressor

1. Using a leak tester, check if refrigerant is leaking from the drain tube.
2. Visually check if a significant amount of refrigerating machine oil is leaking from the drain
3. Using a leak tester, check if refrigerant is leaking from the compressor intake and discharge
4. Check if the compressor clutch correctly turns ON/OFF using onboard checker channels 05
1. With the compressor belt removed, make sure that the compressor rotates smoothly when
2. Check if the compressor clutch correctly turns ON/OFF using onboard checker channels 05
1. Compressor (C/P) malfunctions are typically caused by a fault in the compressor itself but
2. After replacing the compressor, inspect the freezing cycle system by performing
Fig. 5.1/ Freezing cycle check sheet (for reference)
Model
Checked date Year /Month
CH01
CH19
CH20
CH21
CH23
CH24
CH25
High-side
pressure PH
Discharge
(Gauge value)
Low-side
pressure PL
Intake
(Gauge value)
Degree of heating: SH = TK - TL
Discharge temperature check (Fluid compression check):
* The fluid is compressive if the discharge SH is 10°C or lower.
Discharge SH = Discharge temperature - High-side pressure saturation
temperature (converted value)
189
Checking for gas leaks
tube.
(Allowable amount of refrigerating machine oil leaks)
If the total operating time is between 0 and 1500 hours: 0.02 L (20 cc)/1500 hours
If the total operating time is over 1500 hours: 0.014 L (14 cc)/1500 hours
flanges.
and 06.
Checking for "compressor lock"
turned by hand.
and 06.
Inspecting the freezing cycle system after compressor replacement
also may be caused by a fault in the freezing cycle system.
measurements at the following measuring points with the onboard checker (in outdoor unit
data display mode) while the unit is running:
Service agent
/Date S/#
-1
min CH26
MPa CH27
CH28
MPa
°C CH29
°C CH30
°C CH44
°C CH45
Discharge
temperature
MPa
(Measured value)
Saturation temperature
from low-side pressure value
MPa
: (as per Table 6.4) TL =
°C
Operating
time
°C CH46
°C CH47
°C
CH48
°C CH49
°C CH50
°C CH51
°C CH61
1 °C
2 °C
°C
Judgment: 10°C or higher
Discharge SH:
SiAUY361411EA
Person
in charge
Installed
Hr
date
°C CH62
°C CH63
°C CH65
°C CH66
°C CH67
°C
°C
Oil separator
temperature at outlet
(Measured value)
Intake 5 (TS5)
temperature
(Measured value) TK =
OK/NG
°C
Parts Inspection
°C
°C
°C
°C
°C
°C
°C
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