Mars 70810 Instrukcje Operacyjne Pobierz pdf (Strona 10)

Troubleshooting

SYMPTOM CORRECTIVE ACTION

Display is blank Check thermostat wiring & connections.

Check circuit breaker/fuse panel.

No heat Set system switch to

HEAT and raise set point above room temperature.

If flame icon is blinking, allow the 5 minute compressor lock-out to expire.

Check thermostat wiring and connections. Check pilot light or HSI system on furnace.

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.

too frequently or A high differential decreases 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 Set fan switch to

AUTO. Check thermostat wiring & connections.

continuously

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

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Mars 70810 Instrukcje Operacyjne Strona 10