LL357D4 PDS, 4.2011
9
Troubleshooting
Symptom
Remedy
No display
Check for 24 VAC at thermostat; display is blank when
24 VAC is not present.
Indoor blower does not turn on
Verify wiring is correct. Check settings in Config Mode,
No. 6, “Settings”.
All thermostat buttons are inoperative.
Verify 24 VAC is present; unit locks out when 24 VAC
not present.
No response when first button is pressed.
First button pressed only activates backlight.
Air conditioners turns On and Off too frequently
(short cycles)
Increase temperature differential. See Config Mode,
steps 2 & 3.
Status indicator light does not come on during
call for Cooling or Heating.
Turn status indicator light function on. See Config
Mode, Step 14.
Room temperature is not correct.
Calibrate thermostat. See Config Mode, step 11.
Lock icon is displayed when any button is
pressed.
Thermostat has the lockout function activated. See
Lockout Feature and Config Mode, step 8.
Er on display instead of SEn temperature
Check for a bad connection at S1 and S2 terminals.
See Config Mode, step 12
Air conditioner is not cooling or heating.
Verify wiring is correct. Gently pull on each wire to
verify there is a good connection at the terminal bloc.
Problem not listed above
Press Reset once. Time and day are reset;
configurations settings are not changed.
Содержание Marvair LL357D4
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