Using A Gauge Manifold; Normal Condition - Kubota KX080-3 Workshop Manual

WSM KX080-3 Service

(2) Using a gauge manifold

1. Using a gauge manifold, measure the pressures at the low-pressure and high-pressure sides of
refrigeration cycle.
2. Attach a gauge manifold in position and place the machine in the following conditions.
Engine
Door
Air conditioner
Engine rpm
Inside/outside air selection
Temperature setting
Blower speed
Air conditioner suction port temperature
Reference
On a machine equipped with variable displacement compressor or EPR, the suction pressure is con-
trolled. Even if the low-pressure side level is not as specified, the gauge may fail to show such error. In
such case, consider the high-pressure side level, blow-out temperature, sight-glass bubbles and other
factors to make an overall judgment.
The gauge manifold may read somewhat different pressures depending on the conditions.

1) Normal condition

Low-pressure side level
High-pressure side level
Item
(1)
VI-S-13
Conditions
Warmed up
Fully open
ON
1500 rpm
Inside air mode
MAX COOL (Coolest)
HI
30°C 35°C
0.15 0.25 MPa (1.5 2.5 kgf/cm
1.37 1.57 MPa (14 16 kgf/cm
(2)
VI Air Conditioner
2
)
2
)
(1) Low-pressure side
(2) High-pressure side