438335-UIM-B-0509

DIAGNOSTIC FAULT CODE STORAGE AND RETRIEVAL

The control in this furnace is equipped with memory that will store up to five error codes to allow a service technician to diagnose problems more easily. This memory will be retained even if power to the furnace is lost. This feature should only be used by a qualified service tech- nician.

If more than five error codes have occurred since the last reset, only the five most recent will be retained. The furnace control board has a but- ton, labeled LAST ERROR that is used to retrieve error codes. This function will only work if there are no active thermostat signals. So any call for heating, cooling or continuous fan must be terminated before attempting to retrieve error codes.

To retrieve the error codes, push the LAST ERROR button. The LED on the control will then flash the error codes that are in memory, starting with the most recent. There will be a two-second pause between each flash code. After the error codes have all been displayed, the LED will resume the normal slow green flash after a five second pause. To repeat the series of error codes, push the button again.

If there are no error codes in memory, the LED will flash two green flashes. To clear the memory, push the LAST ERROR button and hold it for more than five seconds. The LED will flash three green flashes when the memory has been cleared, then will resume the normal slow green flash after a five-second pause.

(Seconds)

 

 

 

 

 

 

Thermostat Calling for Heat

 

 

 

 

Thermostat Satisfied

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0 2

17

22

52

 

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fan on Delay

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

30 Seconds

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

THERMOSTAT

OFF

 

 

 

ON

 

 

 

 

 

 

 

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INDUCER

 

 

 

 

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OFF

 

 

 

 

 

 

 

 

 

15

 

 

 

 

 

OFF

 

 

 

 

 

ON

 

 

 

 

 

 

 

Sec.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Post

 

 

 

 

 

 

IGNITOR

OFF

 

 

 

 

OFF

 

 

 

 

 

Purge

 

 

 

 

OFF

MAIN VALVE

 

 

 

 

 

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

OFF

 

 

 

 

 

 

 

 

 

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HUMIDIFIER

OFF

 

 

 

 

 

 

 

ON

 

 

 

 

 

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OFF

 

 

 

 

 

 

 

 

ELECTRONIC

 

 

 

 

 

 

 

 

 

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AIR CLEANER

OFF

 

 

 

OFF

 

 

 

 

 

 

 

 

 

 

 

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CIRCULATING

 

 

 

 

 

 

 

 

 

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BLOWER

OFF

 

 

 

OFF

 

 

 

 

 

60, 90, 120, 180 SEC.

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Selectable Fan Off Delay

FIGURE 42: Furnace Control Event Schedule

Johnson Controls Unitary Products

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Johnson Controls TM9V MP installation manual Diagnostic Fault Code Storage and Retrieval, Furnace Control Event Schedule

TM9V MP specifications

The Johnson Controls TM9V MP is a cutting-edge variable capacity air conditioning system designed to provide optimal comfort and energy efficiency for residential and light commercial applications. This model is engineered with advanced technologies that cater to the needs of modern consumers who prioritize both performance and sustainability.

One of the standout features of the TM9V MP is its variable-speed compressor. Unlike traditional systems that operate at a fixed speed, this system can adjust its output based on the indoor temperature and humidity levels. This capability allows for precise temperature control and reduces energy consumption, ultimately leading to significant savings on utility bills. By maintaining a more consistent temperature, the TM9V MP enhances overall comfort in living spaces.

Another critical aspect of the TM9V MP is its integration of intelligent control technology. The system comes equipped with a user-friendly interface, which enables homeowners to easily monitor and adjust settings according to their preferences. Smart home integration is also a key feature, allowing for remote access and control through compatible smart devices. This ensures that users can manage their HVAC settings from anywhere, providing convenience and peace of mind.

The TM9V MP is also designed with high-efficiency ratings, often achieving SEER ratings above 18. This excellent performance not only complies with stringent energy efficiency regulations but also qualifies for various rebates and incentives in many regions, making it a financially attractive choice. The unit’s environmentally friendly refrigerant further emphasizes its commitment to sustainability.

In terms of construction and durability, the TM9V MP boasts a rugged design with high-quality components. Its enhanced sound insulation minimizes operational noise, making it suitable for residential settings where quiet operation is essential. The unit is also designed for easy installation and maintenance, which can further reduce lifecycle costs.

Overall, the Johnson Controls TM9V MP represents a blend of advanced engineering, energy efficiency, and user-friendly technology. Its variable speed compressor, smart controls, high-efficiency ratings, and durable construction make it a top choice for anyone seeking an HVAC solution that meets modern comfort and sustainability standards. With the TM9V MP, users can enjoy the benefits of a comfortable indoor environment while contributing to a greener future.