Service and Parts Manual (2016, 2017, 2018, 2014, 2015, 2013, 2012)

Table Of Contents
93 PB
Available Accessories
Thermostat - Rt6
Troubleshooting
Symptom Remedy
No display Check for 24 VAC at thermostat; display is blank when 24 VAC
is not present
All thermostat buttons are
inoperative
Verify 24 VAC is present; unit locks out when 24 VAC is not
present
No response with first button press First button press activates backlight only
Thermostat turns on and o too
frequently
Adjust temperature dierential
(see Configuration Mode Settings 3 & 4)
Fan runs continuously Press FAN (right) button to turn fan o
Room temperature is not correct Calibrate thermostat (see Configuration Mode Setting 10)
Heat or Cool not coming on
HEAT blinking
Verify wiring is correct, gently pull on each wire to verify there
is a good connection at terminal block
COOL blinking
In heat set point screen, this is normal operation
In cool set point screen, this is normal operation
Problem not listed above Press Reset button once*
* Reset Button Function :
Display is refreshed, configuration settings are unchanged.
Testing the Thermostat
Fan Test
OFF
Cool Test
1. Press FAN (right) button. Fan displays. Indoor fan turns ON.
2. Press FAN (right) button. Indoor fan turns OFF.
Note:
There is a four-minute time delay to protect the compressor after it .
1. Press SYS (left) button until cool mode is displayed.
2. Adjust set temperature so it is 5 degrees below room temperature.
3. A/C should come on within a few seconds.
4. Adjust the set temperature 2 degrees above the room temperature and
the A/C should turn o. There may be a fan delay on your system.
To bypass the compressor time delay, go to OFF mode for 5 seconds.
Once the thermostat is configured, it should be thoroughly tested.
CAUTION!
:
Do not energize the air conditioning system when the outdoor temperature is below
50 degrees. It can result in equipment damage or personal injury.
Heat Test
1. Press SYS (left) button until heat mode is displayed.
2. Adjust the set temperature so it is 5 degrees above the room temperature.
3. Heat should come on within a few seconds.
4. Adjust the set temperature 2 degrees below the room temperature and the
heat should turn o. There may be a fan delay on your system.
Note:
For heat pumps, there is a four-minute delay to protect your compressor after it turns o.
To bypass the compressor time delay, go to OFF mode for 5 seconds.