Ingersoll-Rand ReliaTel, Manual, Page: 34 / 176

34 RT-SVD03L-EN
Table 1. Approximate voltage readings (depending
on control used)
See
“What
the
readings
mean” on
the
following
pages
Thermostat
or
mechanical
ZSM without
indicators or
with no
controls
attached at
all
Programma-
ble ZSM with
indicators
Mechani-
cal ZSM
with
indica-
tors
ON
32 VDC ± 10% 26 VDC ± 10%
2.0 VDC ±
10%
OFF
0.75 VDC ±
10%
0.75 VDC ±
10%
0.75 VDC ±
10%
PULSING
20 to 30 VDC 1.5 to 2.5 VDC
14 to 30
VDC
Service - RTRM-J6-10
What the Readings Mean
• O ON N
Clogged filter switch has been closed for at least
2 minutes, indicating a clogged filter. This
example illustrates what would be seen if the
unit did not have a zone sensor with indicator
LEDs, such as would be the case with an ICS
system.
Table 1, p. 34 lists voltages seen if a
zone sensor is attached. Volt meter readings
should be within 10%.
• O OF FF F
–
Clogged filter switch is in open position or no
switch is installed.
– Fan fail switch (if installed) has opened (3 to 25
Tons) or closed (27.5 to 50 Tons) within the first
40 seconds, proving that the supply fan has
started.
• P PU UL LS SIIN NG G
– Fan proving switch [also called fan fail switch
(FFS)] has failed to open (3 to 25 Tons) or closed
(27.5 to 50 Tons) before 40 seconds. During this
condition, the unit will run for 40 seconds and
then stop. Only the fan will run during the TEST
mode, except during the first 40 seconds.
– Freezestat active
– Smoke detector active
N No otte e:: At the bottom of the meter display, the "analog
bar" will pulse back and forth. Some meters do
not have this extra feature.
RTRM J6
DC
VOLTS
SERVICE
SYSTEM
COOL
HEAT
COMMON
AM
Mo
Service LED
Part Number - SEN01522
System- RTRM-J6-9
What the Readings Mean
• O ON N
System is powered up. This output should be on
whenever the green RTRM System LED is on.
Incidentally, this LED may flicker as part of its
normal function on older version boards.
• O OF FF F
If 0 VDC is seen, the RTRM does not have
power, the output wiring is shorted, or there is
an internal failure. Remove any wires connected
to this terminal and check again.
• P PU UL LS SIIN NG G
Unit is in the TEST mode. Also during the TEST
mode the System LED will pulse on and off. This
output does not provide any diagnostic
information, but is a good place to confirm
voltage readings taken are consistent with what
should be seen on other outputs.
RTRM J6
DC
VOLTS
SERVICE
SYSTEM
COOL
HEAT
COMMON
R Re elliia aT Te ell ™ ™ R Re effrriig ge erra attiio on n M Mo od du ulle e ((R RT TR RM M))