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Test Modes
Upon power initialization, the RTRM
performs self-diagnostic checks to
insure that all internal controls are
functional. 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"
procedures to bypass some time
delays and to start the unit at the
control panel. Each step of unit
operation can be activated
individually by temporarily 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 terminated 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.
18
System Test Modes
ReliaTel™ Controls
There are three methods in which the
"Service Test" can be cycled at LTB-
Test 1(T1) and LTB-Test 2 (T2).
1. Step Test Mode - This method
initiates the different components of
the unit, one at a time, by temporarily
shorting across the two test terminals
for two to three seconds.
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.
Service Test Mode will be ignored if a
short is present across Test 1 and Test
2 at start-up.
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 approximately one hour
even though the resistance is left on
the test terminals.
Table 5.
Service Test Guide for Component Operation
Test Step
Mode
Fan
1
Fan
On
2
Cool 1
On
3
Cool 2
On
(Note 2)
4
Heat 1
On
(Note 2)
5
Heat 2
On
(Note 2)
Note 1. The condenser fans will operate any time a compressor is ON providing the outdoor air
temperature is within the operating value.
Note 2. Steps for optional accessories and non-applicable modes in unit will be skipped.
3. Auto Test Mode - This method is
not recommended for start-up due to
the short timing between individual
component steps. This method
initiates the different components of
the unit, one at a time, when a fixed
jumper is installed across the test
terminals. The unit will start the first
test step and change to the next step
every 30 seconds. 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 5.
Comp 1
Comp 2
Heat 1
Off
Off
Off
On
Off
Off
(Note 1)
On
On
Off
(Note 1)
(Note 1)
Off
Off
On
Off
Off
On
Heat 2
Ohms
Off
2.2KW
Off
4.7KW
Off
6.8KW
Off
10KW
On
15KW
TTA-SVN03A-EN
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Troubleshooting
