69
Table 14 - Gas Heater Troubleshooting Continued
LED
Code
System
Description
Actions
2
Flash
Flame Fault
(No Call for
Heat)
Flame sense failure / flame present
with no call for heat.
1. Check for voltage to gas valve with thermostat
in off position. Valve should not be powered.
2. If valve is not energized, check for gas flow
(manifold pressure reading greater than 0). If gas
flow, turn off main shut-off valve and replace gas
valve.
3
Flash
Ignition
Lockout
Failure to light and or carryover.
Loss of flame or flame signal during
ignition or operation cycle.
Control will initiate up to 3 ignition
re-trials before lockout.
1. Verify gas supply available and operation of
gas valve - manifold pressure at start of ignition
cycle. Check for power to valve terminals LO &
COM while spark is energized.
2. Is spark present? - If not check igniter for debris
between electrodes, cracked ceramic and check
ignition wire for short to ground.
3. Check flame sensor wiring connections to
electrode and control and for any abrasions.
4. Check for cracked ceramic on flame sensor or
grounded sensor rod.
5. Verify that ample air supply and proper venting
of flue gases occurs during operating cycle.
6. Check for circulating air leaks into burner
compartment during operation.
7. Check for re-circulation of flue gases into
combustion air supply.
8. If all conditions satisfactory
– replace ignition
control.
Summary of Contents for M2 Series
Page 2: ......
Page 5: ...5 Split System Piping Diagrams 98 M2 Series Startup Form 115 Maintenance Log 121 ...
Page 35: ...35 Table 1 Electric and Gas Heating Capacities ...
Page 38: ...38 Figure 5 M2 Series Unit Four Point Lifting ...
Page 39: ...39 Figure 6 M2 Series Unit Eight Point Lifting ...
Page 58: ...58 Figure 32 Supply Fan Banding ...
Page 95: ...95 Figure 52 Filter Layout Viewed from the Upstream Side of the Cooling Coil ...
Page 98: ...98 Split System Piping Diagrams Figure 53 A C Split System Piping Suction Down ...
Page 99: ...99 Figure 54 A C Split System Piping Suction Up ...
Page 100: ...100 Figure 55 A C with LAC Split System Piping Suction Up ...
Page 101: ...101 Figure 56 A C with Modulating Hot Gas Reheat Split System Piping Suction Down ...
Page 102: ...102 Figure 57 A C with Modulating Hot Gas Reheat Split System Piping Suction Up ...
Page 103: ...103 Figure 58 A C with Hot Gas Bypass Split System Piping Suction Down ...
Page 104: ...104 Figure 59 A C with Hot Gas Bypass Split System Piping Suction Up ...
Page 107: ...107 Figure 62 Heat Pump Split System Piping Suction Down ...
Page 108: ...108 Figure 63 Heat Pump Split System Piping Suction Up ...
Page 109: ...109 Figure 64 Heat Pump with Modulating Hot Gas Reheat Split System Piping Suction Down ...
Page 110: ...110 Figure 65 Heat Pump with Modulating Hot Gas Reheat Split System Piping Suction Up ...
Page 111: ...111 Figure 66 Heat Pump with Hot Gas Bypass Split System Piping Suction Down ...
Page 112: ...112 Figure 67 Heat Pump with Hot Gas Bypass Split System Piping Suction Up ...