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vickie69Sep 2, 2025
What does it mean if Er1 appears when “T1” key is pressed on my Honeywell Thermostat?
- EErin ThomasSep 2, 2025
If Er1 appears when the “T1” key is pressed, it indicates that the T1 sensor is interrupted. Check the T1 sensor.
To Next PageTo Next PageWhat does it mean if Er1 appears when “T1” key is pressed on my Honeywell Thermostat?
If Er1 appears when the “T1” key is pressed, it indicates that the T1 sensor is interrupted. Check the T1 sensor.
What to do if when pumps are active, unpleasant noise in installation is heard in Honeywell DTC 100/4 TD Thermostat?
If you hear unpleasant noises when the pumps are active, it may be due to a noisy retaining valve with a weak spring. Replace the nonreturn valve with a motor-actuated ball valve “EMV110 800/230..”
What to do if, irrespective of the temp., after-heating pump is continuously switched on and collector pump is inoperative in Honeywell DTC 100/4 TD?
If the after-heating pump runs continuously while the collector pump doesn't, the selector switch may be in the “ON2” position. Set the selector switch to the AUTO position.
What to do if, irrespective of the temp., collector pump is continuously switched on and after-heating pump is inoperative in Honeywell DTC 100/4 TD Thermostat?
If the collector pump is continuously on and the after-heating pump is inoperative, the selector switch may be in the “ON1” position. Set the switch to the AUTO position.
What to do if my Honeywell DTC 100/4 TD water cools down during the night?
If the water cools down during the night, it could be caused by: 1. The selector switch not being in the AUTO position. Set the switch to the AUTO position. 2. One of the retaining valves of the system being inoperative, which enables thermosiphon water circulation. Check the machine installation and consider installing a motor-actuated ball valve “EMV110 800/230..”
What to do if the control light of individual pump is on, but the pump is inoperative in Honeywell DTC 100/4 TD Thermostat?
If the control light of an individual pump is on but the pump isn't working, it could be due to a blocked pump or an interrupted cable. Check the pump and its connection to the regulator.
Why are all pumps inoperative irrespective of the temperatures in my Honeywell DTC 100/4 TD Thermostat?
If all pumps are inoperative regardless of temperature, check the following: * The selector switch might be in the “OFF” position. If so, set the selector switch to the AUTO position. * The temperature limit of the hot water tank may be too low. Increase the maximum temperature in the hot water tank.
General| Thermostat Type | Digital |
|---|---|
| Power Source | Battery |
| Display | LCD |
| Mounting | Wall-mounted |
| Protection Class | IP20 |
| Temperature Range | 0…50 oC |
| Accuracy | ±0.5°C |
| Control | Manual |
| Power Consumption | 1.5W |
Provides guidance for installing and maintaining the differential thermostat.
Details all items included in the thermostat package for user verification.
Explains the thermostat's functions, controllable parameters, and operational logic.
Provides technical specifications, advice on mounting the unit, and external wiring diagrams.
Details terminal functions and instructions for installing the collector sensor.
Covers sensor placement in boilers/tanks and explains the control panel interface.
Step-by-step guide to configuring temperature limits and differential settings for heating circuits.
Explains how to set operating regimes and procedures for disconnecting heating circuits.
How to read temperatures, interpret sensor errors, and use manual control functions.
Wiring diagram for systems incorporating electric motor actuated ball valves.
Wiring diagram for systems utilizing two pumps for circulation.
Wiring diagram for systems using an electric heating element for water after-heating.
Schematics for connecting the electric heating element and controlling the boiler burner.
Provides the precise dimensions required for drilling wall mounting holes.
A comprehensive guide to identifying and resolving common operational problems.
Highlights the specific advantages of using certain ball valves in solar heating applications.
