AC/Air Conditioning — Refrigerant System Inspection with Manifold Gauge Set, page 71

REFRIGERANT SYSTEM INSPECTION WITH MANIFOLD GAUGE SET

This is a method in which the trouble is located by using a manifold gauge set.
(See "USE OF MANIFOLD GAUGE SET" on page AC–11)
Read the manifold gauge pressure when the following conditions are established:
(a) Temperature at the air inlet with the switch set at RECIRC is 30–35 °C (86–95 °F)
(b) Engine running at 1,500 rpm
(c) Blower speed control switch set at high
(d) Temperature control set at max. cool
HINT: It should be noted that the gauge indications may vary slightly due to ambient temperature conditions.

1. NORMALLY FUNCTIONING REFRIGERATION SYSTEM
Gauge reading:
Low pressure side:
0.15–0.25 MPa (1.5–2.5 kgf/cm2)
High pressure side:
1.37–1.57 MPa (14–16 kgf/cm2)

R134a
LO
HI

N04147