Troubleshooting Guide - Honeywell Series 2000 Manual

Commercial microelectronic thermostat

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TROUBLESHOOTING GUIDE

Symptom

Display will not come on.

Temperature settings will not

change (Example: cannot set

the heating higher or the

cooling lower).

Heating will not come on.

63-4356—1

Action

• Check if the circuit breaker is tripped—reset the circuit breaker.

• Check if the fuse is blown—replace the fuse.

• Check if the system switch at the equipment is in the Off position—

set to the On position.

• Check wiring between thermostat and HVAC equipment—replace

any broken wires.

• If 24 Vac is present, proceed with troubleshooting.

• Check that the temperature setpoints are:

- heating: 40 to 90°F (7 to 31°C)

- cooling: 45 to 99°F (9 to 37°C).

• Keyboard is locked. Contact the installer.

• Check if the circuit breaker is tripped—reset the circuit breaker.

• Check if the fuse is blown—replace the fuse.

• Check if the system switch at the equipment is in the Off position—

set to On position.

• If 24 Vac is present, proceed with troubleshooting.

• Wait five minutes for the system to respond.

• Set system selection to Heat.

(Continued)

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