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Table 36 - Service Test Guide for Component Operation on gas-fired units
Indoor
Step
Mode
Fan
1
Fan On
On
2*
Econ.
On
3
CooI1
On
4
CooI2
On
5
Heat1
On
6
Heat2
On
* With Optional Accessory
** "Off" If temperature falls below 16° (±1°)°C, "On" if temperature rises above 18°(±1°)°C.
Note: Steps for optional accessories and modes not present in unit will be skipped.
50
Operation
Test modes
There are 2 methods in which the
"Test" mode can be cycled with the
test button:
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 1 hour to
complete the check.
Compressor
Economizer
1
Min
Off
Open
Off
Min
On
Min
On
Min
Off
Min
Off
Compressor
Heat 1
2
Off
Off
Off
Off
Off
Off
On
Off
Off
On
Off
On
2. 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 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 and test modes,
values to cycle the various
components, refer to Table 36.
Heat 2
Outdoor 1
Off
Off
Off
Off
Off
On
Off
On
Off
Off
On
Off
Outdoor 2
Off
Off
**
**
Off
Off
RT-SVX19A-E4
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