23
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.
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 com-
ponents 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 re-
sistance 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 ter-
minals.
3. Auto Test Mode
- This method is not recommended for
start-up due to the short timing between individual compo-
nent 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 7.
Service Test Modes
ReliaTel
TM
Controls
Table 7
Service Test Guide for Component Operation
Test Step
Mode
Fan
Comp 1 Comp 2
Heat 1
Heat 2
Ohms
1
Fan
On
Off
Off
Off
Off
2.2KW
2
Cool 1
On
On
Off
Off
Off
4.7KW
(Note 1)
3
Cool 2
On
On
On
Off
Off
6.8KW
(Note 2)
(Note 1) (Note 1)
4
Heat 1
On
Off
Off
On
Off
10KW
(Note 2)
5
Heat 2
On
Off
Off
On
On
15KW
(Note 2)
Notes:
1- The condenser fans will operate any time a compressor is “On” providing
the outdoor air temperature is within the operating values.
2- Steps for optional accessories and non-applicable
modes in unit will be skipped.
