Why does my compressor(s) work in Test Mode but not on a 24 Volt Thermostat?
Solution:
All Units:
- First make sure nothing is connected to the RTRM J6 terminal block and also make sure the unit is not being controlled by a Communication Board connected to the RTRM J4.
- Is there 24Vac from Y1 to COM on the RTRM J7 terminal block?
- Yes, go to step 3.
- No, check thermostat.
- Remove thermostat wires from W1/O and or W2, if the compressor comes on check to see if there is any voltage on the wires that was connected to W1/O and or W2. If there is any voltage on these wires the Reliatel board interprets this as a Heat and Cool call at the same time and will just run the Indoor Fan.
Units with an economizer:
- Locate the J8 plug on the RTRM and remove it, if the compressor comes on within 60 seconds the unit is economizing.
Notes:
If you have a single compressor unit with an economizer and only have a thermostat wire connected to Y1 and if it is okay to economize you will never get a compressor to come on.
Remedy:
If you have a 2-stage thermostat connect up the Y2
If you don’t have a 2-stage thermostat, you can put a jumper between Y1 and Y2 at the RTRM J7 terminal block. Then if it is okay to economize, after the economizer has been 100% open for 5 minutes the compressor will come on.
WARNING:
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.