To Next PageTo Next PageWhat to do if my Robertshaw Thermostat display shows 'CHECK'?
If your Robertshaw Thermostat's display shows 'CHECK', it means the system status is being monitored. It is recommended to call your local HVAC service provider for assistance.
Electrical Specifications| electrical rating | 24 Volt AC (18-30 VAC) |
|---|---|
| maximum load per terminal | 1 amp |
| total maximum load | 3 amp |
Temperature Control| temperature control range | 45˚- 90˚F (7˚- 32˚C) |
|---|---|
| accuracy | +/-1˚F (+/-.5˚C) |
| power | 24 VAC |
Shipping Information| individual carton dimensions | 6.75" x 4.375" x 1.625" |
|---|---|
| master carton dimensions | 9.25" x 5.625" x 7.625" |
| master carton weight | 4.0 lbs. |
Describes the Robertshaw 9420 as a multi-stage thermostat for 24 VAC heat pump systems.
Lists key features like setpoints, display, differentials, and protection modes.
Crucial warnings about power, voltage, codes, and shorting terminals.
Instructions for replacing an old thermostat and wiring cross-references.
Guidance on proper disposal of mercury-containing thermostats.
Instructions for mounting the thermostat, securing wires, and making connections.
Illustrates typical wiring configurations for heat pumps.
Details the purpose and requirement for each terminal connection.
Procedures to test cooling, heating, and fan functions.
Explains System modes (Cool, Off, Heat, Emer) and Fan modes (Auto, On).
How to adjust temperature setpoints, differentials, and delay times.
Information on how the backlit display activates and deactivates.
Instructions on how to reset the thermostat using the reset button.
Lists common symptoms and their remedies for thermostat issues.
Outlines the warranty period, exclusions, and consumer rights.
