125
Check EXV Motor Windings Resistance
— To check the
resistance of the EXV motor windings, remove the EXV plug
at J2A (economizer EXV) or J2B (condenser EXV) and check
resistance. The resistance should be 52 ohms (± 10%). See
Fig. 68.
Check Condenser Level Sensor Resistance
— The level sen-
sor provides a voltage between white (output) and black
(ground) wires proportional to red (+) and black (ground) volt-
age. If the level sensor is suspected of misreading, check the re-
sistance between red (+) and black (ground) wries. It should
measure approximately 1800 ohms. Figure 69 shows condens-
er liquid level sensor components.
Physical Data — Tables 27-40 and Fig. 70-81 provide
additional information on component weights, physical and
electrical data, and wiring schematics for the operator’s conve-
nience during troubleshooting.
1
1
/
16
in. (27 mm)
36 ft-lb (50 Nm) + 30˚
a23-1724
CAUTION
Do not attempt to disconnect flanges while the machine is
under pressure. Failure to relieve pressure can result in per-
sonal injury or damage to the unit.
COIL A
COIL B
COIL A = 52 OHMS
COIL B = 52 OHMS
a23-1725
Fig. 68 — EXV Motor Windings Resistance
CAUTION
Before rigging the compressor, disconnect all wires enter-
ing the power panel to avoid damage to the panel.
LO = 4 in. ±
1
/
16
in.
2
13
/
16
in. ±
1
/
8
in.
(INDICATION= 2
1
/
4
in.)
(0.31 in. DIAM.)
(1.02 in. DIAM.)
GRIP RING
FLOAT
2
5
/
16
in. - 12 UNF 2A
O-RING
½ in. NPT CONDUIT
LABEL
WIRE, PVC
22 AWG
12 TO 14 in. EXT
a23-1726
Fig. 69 — Condenser Liquid Level Sensor
To Next Page
Loading...
