Mars 70814, Инструкция по установке и эксплуатации, Страница: 11 / 16

11
Troubleshooting
SYMPTOM CORRECTIVE ACTION
Display is blank Install 2 fresh AA Alkaline batteries.
Check wiring connections on thermostat.
No heat Set system switch to
HEAT
and raise set point above room temperature.
Check thermostat wiring and connections.
No cool Set system switch to
COOL
and lower set point below room temperature.
If snowflake icon is blinking, allow the 5 minute compressor lock-out to expire.
Check thermostat wiring & connections.
System turns on/off Adjust the differential setting on the thermostat. A high differential decreases
too frequently or cycle rate and a low differential increases cycle rate.
not enough
Display is not illuminated Touch the up or down arrow key. Display will illuminate for 10 seconds.
Room temperature and Normal (depending on differential setting). Check for drafts that could quickly
set point disagree change the room temperature before the system is able to correct it.
System fan runs continuously Set fan switch to AUTO. Check thermostat wiring & connections.
Reduce room temperature or allow a newly installed thermostat to acclimate.
HI indicates a room temperature reading greater than 90 F (32 C).
Increase room temperature or allow a newly installed thermostat to acclimate.
LO indicates a room temperature reading less than 45 F (7 C).
HI is displayed
LO is displayed
70814-IM 12/22/06 2:00 PM Page 11