Thermo Scientific ThermoFlex1400

Questions and Answers

L
Lauren GallagherAug 8, 2025
How to troubleshoot a Thermo Scientific ThermoFlex1400 that will not start?
- Z
  Zachary NelsonAug 8, 2025
  If your Thermo Scientific Chiller won't start, begin by inspecting the electrical connections. If it's the first time you're using it, refer to the quick start instructions. Check the controller for any error codes. Also, make sure the optional GFCI breaker on the rear is in the up position. For ThermoFlex900 - 10000 chillers, ensure the circuit protector is in the on ( I ) position. Confirm that the supply voltage is connected and matches the chiller's nameplate rating ±10%. If there's no display or it shows 8888 on ThermoFlex900 - 10000, try recycling the circuit protector on the rear.
D
Dr. Dennis MartinAug 27, 2025
How to fix inadequate temperature control on a Thermo Scientific Chiller?
- E
  elizabethfaulknerAug 28, 2025
  To address inadequate temperature control in your Thermo Scientific Chiller, start by verifying the setpoint. If the chiller is over-cooling, recycle the power. Ensure the condenser/air filter is free of dust and debris, and confirm the chiller installation complies with site requirements. Check that the supply voltage matches the chiller's nameplate rating ±10%. For ThermoFlex900 - 5000 global voltage chillers, make sure the chiller is properly configured. If the temperature continues to rise, ensure your application's heat load does not exceed the rated specifications. Also, check for high thermal gradients and verify/adjust controller PID values.
N
Nicholas BensonNov 18, 2025
What to do if my Thermo Scientific ThermoFlex1400 Chiller shuts down unexpectedly?
- J
  Jessica CastroNov 18, 2025
  If your Thermo Scientific Chiller shuts down, first ensure that wasn't accidentally pressed. Check that the optional GFCI breaker on the rear is in the up position and, for ThermoFlex900 - 10000 chillers, that the circuit protector is in the on ( I ) position. Examine the controller for error codes. Remember the chiller is designed to shut down if not properly primed. Confirm the supply voltage matches the chiller's nameplate rating ±10%, and then restart the chiller. If there is inadequate pump pressure, ensure any user installed in-line valves are in the desired position. Also, ensure the chiller’s process fluid outlet is connected to the application’s fluid inlet and not the application’s fluid outlet. All connections should be secure, using the proper sealant/lubricant for the fitting ...

Summary

Section 1 Safety

Safety Warnings

Critical safety warnings and hazard identification symbols for chiller operation.

Section 2 General Information

Specifications

Technical specifications for various ThermoFlex models, including dimensions and performance.

Section 3 Installation

Site Requirements

Electrical Requirements

Electrical specifications, including voltage, frequency, phase, and circuit protection.

Electrical Service Requirements (Standard chillers)

Table detailing electrical requirements for standard chiller models.

Electrical Service Requirements (Variable voltage chillers)

Electrical requirements for chillers with variable voltage options.

Electrical Service Requirements (Global Voltage chillers)

Electrical requirements for chillers with global voltage options.

Hard Wire Installation

Instructions for connecting the chiller directly to the electrical supply.

Plumbing Requirements

Guidelines for connecting process fluid and facility water lines to the chiller.

Process Fluid Requirements

Priming

Steps for filling and priming the chiller and process fluid lines for initial startup.

Initial Filling

Section 4 Operation

Setup

Initial setup procedures for the chiller controller, including quick start instructions.

Start Up

Step-by-step guide for powering on and initializing the chiller and its controller.

Setpoint Loop

Procedure for displaying and adjusting the desired process fluid temperature setpoint.

Setup Loop

Adjusting and verifying various controller settings, including scales, alarms, and optional features.

Shut Down

Section 6 Preventive Maintenance

Preventive Maintenance Timer

Using the integrated timer to schedule and remind about filter changes and maintenance.

Fluid Maintenance

Condenser Filter

Diagnostic Loop

Testing the Alarm Features

Verifying the chiller's reaction to alarm limits by adjusting setpoints and simulating conditions.

Section 7 Troubleshooting

Operational Error Codes

Table of error codes, their causes, reactions, and recommended actions for diagnosing issues.

Checklist

Troubleshooting checklist for common chiller issues such as no display or failure to start.

Clearing Error Codes

Procedure for clearing error codes and silencing alarms on the controller.

Chiller shuts down

Troubleshooting steps when the chiller unexpectedly shuts down.

Inadequate pump pressure

Troubleshooting steps for issues related to insufficient pump pressure.

Chiller will not circulate process fluid

Inadequate temperature control

Troubleshooting steps for maintaining accurate temperature control.

Verifying;Adjusting the Controller PID Values

Procedure for adjusting PID loop parameters to correct temperature control issues.

Section 8 Additional Information

Draining

Internal Process Fluid Temperature Sensor (rdt1) Calibration

Step-by-step guide for calibrating the internal fluid temperature sensor.

Internal Temperature Sensor Calibration

Detailed procedure for calibrating the internal temperature sensor, including high and low points.

Process Fluid Pressure (P1) Transducer Calibration

Procedure for calibrating the process fluid pressure (P1) transducer.

Pressure (P1) Calibration

Visual guide for calibrating the process fluid pressure (P1) transducer.

Optional Process Fluid Flow (FLo) Transducer Calibration

Calibration procedure for the optional process fluid flow (FLo) transducer.

Flow Transducer (FLo) Calibration

Visual guide for calibrating the optional process fluid flow (FLo) transducer.

Clearing SEr Codes

Decommissioning;Disposal

Appendix C Analog I;0 and Remote Sensor

Analog I;O Connector Pinout

Analog Input Calibration

Procedure for calibrating the analog voltage input type for sensors and signals.

Analog Output Calibration

Procedure for calibrating the analog output (DAC) for voltage/current signals.

Remote Sensor Connector Pinout

Remote Sensor Calibration

Procedure for calibrating the remote temperature sensor for accurate readings.

Appendix D Serial Communications

NC Serial Communications Protocol

Serial Communications Loop

Table of Commands

Thermo Scientific ThermoFlex1400 Specifications

General

Cooling Capacity	1400 W
Cooling Capacity @ 20°C	1400 W
Temperature Range	+5°C to +40°C
Temperature Stability	±0.1°C
Pump Type	Centrifugal
Fluid Compatibility	Water, Water/Glycol mixtures
Power Requirements	230V, 50/60Hz
Refrigerant	R134a
Power Supply	230V, 50/60Hz
Weight	57 kg