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Operation
53RT-SVX20A-E4
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 startup
of the unit, this method allows the
technician to cycle a component
"On" and have up to 1 hour to
complete the check.
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 Tables 48
and 49.
Table 48 - Service Test Guide for Component Operation on cooling only units
* 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.
Table 49 - Service Test Guide for Component Operation on Heat Pump Units
* 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.
Step
Mode
Indoor Fan motor
Economizer
Compressor 1
Compressor 2
Heat 1
Heat 2
Outdoor Fan Motor 1
Outdoor Fan Motor 1
1 Fan On On Min Off Off Off Off Off Off
2* Economizer On Open Off Off Off Off Off Off
3 Cool 1 On Min On Off Off Off On **
4 Cool 2 On Min On On Off Off On **
5* Heat 1 On Min Off Off On Off Off Off
6* Heat 2 On Min Off Off On On Off Off
Step
Mode
Indoor Fan motor
Economizer
Compressor 1
Compressor 2
Heat 1
Heat 2
Outdoor Fan Motor 1
Outdoor Fan Motor 1
1 Fan On On Min Off Off Off Off Off Off
2* Economizer On Open Off Off Off Off Off Off
3 Cool 1 On Min On Off Off Off On **
4 Cool 2 On Min On On Off Off On **
5* Heat 1 On Min Off Off On Off Off Off
6* Heat 2 On Min Off Off On On Off Off