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WARNING
Live Electrical Components!
During installation, testing, servicing and troubleshoot-
ing of this product, it may be necessary to work with
live electrical components. Have a qualified licensed
electrician or other individual who has been properly
trained in handling live electrical components perform
these tasks. Failure to follow all electrical safety pre-
cautions when exposed to live electrical components
could result in death or serious injury.
To prevent injury or death from electrocution, it is the re-
sponsibility of the technician to recognize this hazard and
use extreme care when performing service procedures
with the electrical power energized.
ReliaTel Controls
Upon power initialization, the RTRM performs self-diag-
nostic checks to insure that all internal controls are func-
tional. It also checks the configuration parameters against
the components connected to the system. The Liteport
LED located on the RTRM module is turned "On" within
one second of power-up if internal operation is okay.
Use one of the following "Test" procedure to bypass some
time delays and to start the unit at the control panel. Each
step of unit operation can be activated individually by tem-
porarily shorting across the "Test" terminals for two to
three seconds. The Liteport LED located on the RTRM
module will blink when the test mode has been initiated.
The unit can be left in any "Test" step for up to one hour
before it will automatically terminate, or it can be termi-
nated by opening the main power disconnect switch. Once
the test mode has been terminated, the Liteport LED will
glow continuously and the unit will revert to the "System"
control.
Table 6
Service Test Guide for Component Operation
TEST
MODE
Fan
STEP
Fan
On
1
Minimum
Ventilation
On
2
Economizer
Test Open
On
3
Cool
Stage 1
On
4
Cool
(Note 3)
Stage 2
On
5
Reheat
On
(Note 3)
6
Heat
(Note 3)
Stage 1
On
7
Heat
(Note 3)
Stage 2
On
Notes:
1 - The condenser fans will operate any time a compressor is "On"
providing the outdoor air temperatures are within the operating values.
2 - The exhaust fan will turn on anytime the economizer damper position is equal
to or greater than the exhaust fan setpoint.
3 - Steps for optional accessories and non-applicable modes in unit will be skipped.
Pre-start
Econ
Comp
Comp
(Note 2)
1
2
Minimum
Position
Off
Off
Setpoint
0%
Selectable
Off
Off
Open
Off
Off
Minimum
(Note 1)
Position
On
Off
Minimum
(Note 1)
(Note 1)
Position
On
On
Minimum
On
On
Minimum
Off
Off
Minimum
Off
Off
Test Modes
There are three methods in which the "Test" mode can be
cycled at LTB-Test 1 and LTB-Test 2.
1. Step Test Mode - This method initiates the different com-
ponents of the unit, one at a time, by temporarily short-
ing across the two test terminals for two to three sec-
onds.
For the initial start-up of the unit, this method allows the
technician to cycle a component "On" and have up to one
hour to complete the check.
2. Resistance Test Mode - This method can be used for
start-up providing a decade box for variable resistance
outputs is available. This method initiates the different
components of the unit, one at a time, when a specific
resistance value is placed across the two test terminals.
The unit will remain in the specific test mode for ap-
proximately one hour even though the resistance is left
on the test terminals.
3. Auto Test Mode - This method is not recommended for
start-up due to the short timing between individual com-
ponent steps. This method initiates the different compo-
nents of the unit, one at a time, when a jumper is in-
stalled across the test terminals. The unit will start the
first test step and change to the next step every 30 sec-
onds. At the end of the test mode, control of the unit will
automatically revert to the applied "System" control
method.
For unit test steps, test modes, and step resistance values
to cycle the various components, refer to Table 6.
Heat
Heat
Ohms
1
2
Off
Off
2.2K
Off
Off
Off
Off
3.3K
Off
Off
4.7K
Off
Off
6.8K
Off
Off
33K
On
Off
10K
On
On
15K
32
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