Trane R Series Diagnostic Troubleshooting Repair page 70

SEHI Valve Module
MANUF .
USE ONLY
L
0
W SWITCH CIRCUIT 1 GND —
V LOW PRESSURE SIG. —
0
SWITCH CIRCUIT 2 GND —
L
T SATURATED EVAPORATOR —
A TEMPERATURE CIRCUIT 1 —
T
A COMPRESSOR SUCTION —
G TEMPERATURE CIRCUIT 1 —
E
SATURATED EVAPORATOR —
I TEMPERATURE CIRCUIT 2 —
N
P COMPRESSOR SUCTION —
U TEMPERATURE CIRCUIT 2 —
T
S
ELECTRONIC
.
EXPANSION
O
VALVE
U
CIRCUIT 1
T
P
U
ELECTRONIC
T
EXPANSION
S
VALVE
CIRCUIT 2
Figure 21 SEHI Electronic Expansion Valve Module (1U3)
70
Module Power and Miscellaneous I/O
° TP1 +5V
IPC (+) — J1-4
IPC (-) — J1-3
IPC (+) — J1-2
IPC (-) — J1-1
NO CONN. — J2-2
NO CONN. — J2-1
LOW PRESSURE SIG.— J7-5
J7-4
KEY — J7-3
J7-2
J7-1
J3-9
J3-8
J3-7
J3-6
N/C KEYING — J3-5
J3-4
J3-3
J3-2
J3-1
RED — J4-5
GREEN — J4-4
KEY (N/C) — J4-3
J4-2
WHITE —
BLACK — J4-1
RED — J5-6
GREEN — J5-5
KEY (N/C) — J5-4
KEY (N/C) — J5-3
WHITE — J5-2
BLACK — J5-1
I/0 terminals
For the checkout of the I/O, refer to the block diagram of the EXV module in
Table 21 and the Chiller Wiring Diagrams for both high and low voltage
circuits. All voltages are measured differently between terminal pairs
J6-1 — 115VAC HOT
J6-2 — 115VAC HOT
J6-3 — KEY (N/C)
J6-4 — NEUTRAL
J6-5 — NEUTRAL
on
off
SW-1
24 VDC Peak only
when the Phase is
being stepped.
H
I
G
H
V
0
L
T
A
G
E
I
N
P
U
T
S
RLC-SVD03A-EN