Energy Tech Laboratories MR212 Manual Do Utilizador

 

23

Light Indication 

Possible Cause 

No Lights 

Power not available to Remote Panel 

Bad voltage to unit 
Main disconnect in “OFF” Position 
Circuit breaker tripped 
Bad main transformer 

POWER Light Only 

Proper unit Off Operation 

No problem 

No power to motor starter 

Manual/Off/Auto Switch in “Off” Position 
(3 Position Remote Panels Only) 
Improper damper function 
Low Temperature Thermostat Timed 
Out (Option) 

POWER Light and  
BLOWER ON Light 

Proper Ventilation Operation 

No Problem 

No Power to Flame Safety Controller 

Manual/Off/Auto Switch in “Off” Position 
(2 Position Remote Panels Only) 
Heat/Vent Switch in “Vent” Position 
Gas Pressure Switch Tripped (option) 
High Temperature Limit Thermostat 
Tripped 
Manual/Off/Auto Switch in “Auto” 
Position and Intake Air Thermostat not 
Satisfied 

Improper Airflow 

Insufficient Airflow 
Excessive Airflow 
Bad airflow switch 
Problem with air probes 
Problem with airflow tubing 
Broken Belt 

POWER Light and  
BLOWER ON Light and 
BURNER ON Light 

Proper Heating Operation 

No Problem 

CLOGGED FILTER Light On 
(Optional) 

Filters Clogged 

Filters Dirty or Need Replacement 

FLAME FAILURE Light On 

Flame Safety Alarm Activated 

 

No Flame Detected during Pilot 
Establishment Period 

Combination Valve in “Off” Position 
(Unit Sizes 1-3) 
Stuck Closed Gas Valve 
No or Low Gas Pressure 
Bad Spark Electrode 
Bad Ignition Transformer 
Flames Sensor Malfunction 
Clogged Pilot Orifices