Lennox International Inc Zone Control Panel, LZP-2 Detecting HEATING, Cooling and FAN Problems

Page 11

Troubleshooting (continued)

DETECTING HEATING, COOLING AND FAN PROBLEMS

Symptom

Possible Solution

 

 

 

No power to control panel. Green “Normal Flashing”

Nothing comes on.

LED should be blinking, if not apply power to

 

24VAC inputs of control panel. Check fuse.

 

 

 

Single transformer system. Install jumper between RC

 

and RH at HVAC Equipment outputs of control panel.

 

 

 

Interlock switch on furnace is open – close access doors.

 

 

 

Thermostat is not calling for heat. Check voltage at

Heat will not come on.

the thermostat W input on the control panel.

 

 

 

Zone 2 calling while open or short at DAS inputs is

 

causing control panel to respond only to Zone 1.

 

 

 

Thermostat is power robbing or mechanical. Only use

 

line powered electronic thermostat with a C terminal.

 

 

 

Single transformer system. Install jumper between RC

 

and RH at HVAC equipment outputs of control panel.

 

 

 

Thermostat is not calling for cooling. Check voltage

 

at the thermostat Y input on the control panel.

 

 

Cooling will not come on.

Thermostat could be invoking a timed off delay.

 

Zone 2 calling while open or short at DAS inputs is

 

 

causing control panel to respond only to Zone 1.

 

 

 

Zone panel could be invoking a timed off delay.

 

 

 

Thermostat is power robbing or mechanical. Only use

 

line powered electronic thermostat with a C terminal.

 

 

 

Check if G is energized at the zone panel.

 

 

Fan will not come on.

Check if G is energized at the thermostat.

 

 

 

Check if G is energized at the air handler.

 

 

Dampers do not position on a call for heating,

System requires the Discharge Air sensor. If DAS is not

installed, only Zone 1 calls will be recognized and dampers

cooling or fan. Heat, cooling or fan will not come on

will not operate. Disconnect power to the control panel,

when the Zone 2 thermostat is calling.

install the DAS and restore power to the control panel.

 

 

 

Fan immediately comes on with heat call.

ELECT/GAS jumper set to ELECT – change setting

to GAS.

 

 

 

After a cool call, the fan stops then starts right

HVAC system has built in duct purge. Set PURGE/NO

away only to stop a short while later.

PURGE jumper on control panel to NO PURGE.

 

 

 

Discharge air temperature exceeds set limit.

Fan is running but no heat, and W LED is blinking.

Allow discharge air to cool 10° below set limit and

 

allow timed off delay to expire.

 

 

 

Discharge air temperature dropped below set limit.

Fan is running but no cooling, and Y LED is blinking.

Allow discharge air to warm 10° above set limit and

 

allow timed off delay to expire.

 

 

Both the Y and W LEDs are blinking.

An open or short in the DAS sensor has been detected.

Install or repair the sensor.

 

 

 

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Contents Transformers Shipping & Packing ListPackage 1 of 1 contains the following Required Components ordered separatelyApplication FeaturesInstallation Discharge AIR Sensor Location HEAT/COOL Thermostat RequirementsRound Rectangular Bypass Damper SizingExample Field Wiring LEDs Pin Jumper Settings see FigureCooling Operation Sequence of OperationHeating and Cooling Equipment Operation Heating OperationDamper Operation Continuous FAN OperationSymptom Possible Solution TroubleshootingDetecting Hvac System Problems Detecting HEATING, Cooling and FAN Problems Resistance ohms Detecting Damper ProblemsChecking Thermostat Voltages Discharge AIR Sensor Checkout
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Manual 8 pages 60.06 Kb

Zone Control Panel, LZP-2 specifications

Lennox International Inc, a leader in the HVAC industry, has made significant strides in advancing climate control technologies, particularly with their innovative HVAC Zone Control System, designated LZP-2. This system is designed to provide enhanced comfort and energy efficiency in residential and commercial settings by allowing for precise temperature control across different zones within a building.

One of the main features of the LZP-2 HVAC Zone Control System is its ability to operate multiple zones independently. This zoning capability means that different rooms or areas can be set to different temperatures based on usage patterns or individual preferences. Homeowners can enjoy a cooler environment in living spaces while maintaining a warmer temperature in less frequently used zones, such as guest rooms or basements. This tailored approach not only improves comfort but also leads to significant energy savings.

Another key characteristic of the LZP-2 is its smart technology integration. The system can be connected to a comprehensive home automation network, allowing users to manage their HVAC settings remotely. With mobile applications, users can adjust their zone temperatures from anywhere, ensuring optimal comfort when they return home. Integration with smart thermostats also enables the LZP-2 to learn household occupancy patterns, optimizing heating and cooling schedules for maximum efficiency.

The LZP-2 also employs advanced sensor technology to monitor temperature and airflow in various zones. These sensors provide real-time data, enabling the system to make adjustments to maintain desired conditions effectively. This responsiveness not only ensures comfort but also prevents energy waste, leading to reduced utility bills.

In terms of installation and operation, the LZP-2 is designed for user-friendly implementation. Compatible with most HVAC systems, the zoning panel can be integrated seamlessly during the initial setup or retrofitted into existing systems. The modular design allows for expansion, meaning additional zones can be added as needed without significant disruptions.

Lastly, the LZP-2 HVAC Zone Control System is backed by Lennox's longstanding reputation for quality and reliability. With robust build quality and excellent customer support, users can be assured of a dependable solution for their climate control needs.

In summary, the Lennox LZP-2 HVAC Zone Control System represents a significant leap forward in home and commercial climate management, combining advanced zoning capabilities, smart technology, and user-friendly design to create a superior indoor environment with enhanced energy efficiency.
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