Troubleshooting | Lochinvar 1.0- 1.3- 1.5 specs

Modbus Instructions

6Troubleshooting

Should you encounter problems communicating over Modbus, the following items should be checked in this order:

1.Physical Layer

2.Communications Configuration and Port Settings

3.Modbus Error Codes

4.Unit Status / Blocking / Lockout Codes

Physical Layer

1.Check that all components have power (Boiler, Gateway, BAS Master)

2.Check all wire lengths. Are any drops too long?

3.Check proper shield grounding

4.Check A, B terminal connections

5.Check for Terminating Resistors (120 ohms)

6.Check for broken wires

Communications

1.Check Dip Switch Configuration of MTR-01 Board

2.Check Baud Rate (9600, 19200)

3.Check Parity

4.Check Slave ID

5.Check Port Setting on Master, Gateway, and Computers

Modbus Error Codes

1.Check Modbus communication for error codes (see page 6 for Modbus Exception Codes)

2.Check Modbus PDU

3.Check Slave ID

4.Check Modbus Command

5.Check Configuration bits for Holding Register 40001

6.Check Commands and data for Holding Registers 40002 - 40007

Unit Status Codes

See Codes in this section

Boiler Status

The SYNC boiler displays a boiler state code on the Building Screen to help aid in troubleshooting. The boiler state indicates what the boiler is actually doing. This state should be compared to the command issued and what is expected. If the boiler state does not agree with the command issued, check communication and configuration.

Status Codes (Input Registers 30014 and 30023)

2 = Heat Demand blocked due to high absolute outlet temperature

3 = Heat Demand blocked due to high absolute flue temperature

4 = Heat Demand blocked due to high absolute Delta T (Outlet - Inlet)

8 = Heat Demand blocked due to Low 24 VAC 9 = Outdoor shutdown

10 = Block due to switch OFF boiler (ON/OFF of Display)

12 = Block due to no correct communication Cascade

16 = Service function

19 = DHW function Storage Tank

21 = SH function Heat demand from Room Thermostat

22 = SH function Heat demand from Boiler Management System

23 = SH function Heat demand from Cascade

30 = Heat demand activated by Freeze Protection

32 = DHW Pump Delay

33 = SH Pump Delay

34 = No heat function (after pump delay)

40 = Lockout

32764 = Busy with updating status

32765 = DHW blocked due to no present tank sensor 32766 = Burner control(s) manually shut down 32767 = Code not present

Blocking Codes (Input Registers 30015 and 30024)

0 = No blocking _> is divided into sub blockings 1 = SH blocking

2 = Blocking Due to Low 24 VAC Supply

3 = Blocking due to General block

4 = Blocking MRHL is open

5 = Blocking due to Switched OFF boiler (Display ENTER switch)

6 = Blocking due to wrong communication of Cascade

7 = Blocking due to High Delta

8 = Blocking due to High Flue Temperature

9 = Blocking due to High Outlet Temperature

10 = Service blocking

12 = DHW blocking high outlet temperature (DHW configured as storage tank)

13 = Blocking anti-cycling time

14 = Storage Tank demand Blocked due to Fan problems

15 = No system sensor connected and leader control present 16 = Limit fan speed due to high outlet temperature

17 = Fan min decreased due to low flame current 18 = Limit max fan speed due to high Delta T

19 = Limit max fan speed due to high flue temp 32767 = Code not present

1.0- 1.3- 1.5 specifications

Lochinvar has long been recognized as a leader in the water heating industry, offering high-efficiency solutions for residential and commercial applications. Among its celebrated products are the Lochinvar 1.0, 1.3, and 1.5 models, which represent a range of advanced technologies and features designed to meet diverse customer needs.

The Lochinvar 1.0 is crafted for residential applications, featuring a robust design that emphasizes energy efficiency and reliability. This model incorporates condensing technology, ensuring that water heating is optimized, resulting in reduced energy costs. With a thermal efficiency rating of up to 95%, the Lochinvar 1.0 significantly lowers fuel consumption while providing ample hot water for households. This model also includes a digital control system that offers precise temperature management, enhancing user convenience.

Moving up the scale, the Lochinvar 1.3 model is tailored for slightly larger residential needs and small commercial spaces. This model not only maintains high efficiency with a similar condensing technology but also boasts an expanded capacity. It is equipped with advanced features like an integrated tankless design, which ensures an uninterrupted supply of hot water without the need for a bulky storage tank. Moreover, the Lochinvar 1.3 offers advanced diagnostics, allowing homeowners and technicians to troubleshoot issues quickly and efficiently.

The Lochinvar 1.5 model ramps up the capability even further, catering to larger commercial applications or extensive residential requirements. It offers exceptional performance with an increased output and efficiency, ensuring that even in high-demand scenarios, users are not left wanting for hot water. With an impressive thermal efficiency rating exceeding 96%, this model is engineered to meet stringent energy regulations while providing reliable performance.

All three models feature durable components including stainless steel heat exchangers, enhancing longevity and resistance to corrosion. They also integrate user-friendly interfaces, making them accessible for easy adjustments and monitoring. Additionally, all Lochinvar models are designed with environmental responsibility in mind, contributing to reduced greenhouse gas emissions.

In summary, Lochinvar's 1.0, 1.3, and 1.5 models showcase a commitment to innovation in water heating technology. They offer a blend of efficiency, capacity, and user-friendly features suitable for various applications, making them a wise choice for those in search of reliable hot water solutions.