Ace Heating Solutions Atlas A050 Operating And Maintenance Manual page 104

94 Header sensor fault
95 Stack sensor fault
96 Outdoor sensor fault
97 Internal Fault: A2D mismatch.
98 Internal Fault: Exceeded VSNSR voltage
tolerance
99 Internal Fault: Exceeded 28V voltage tolerance
105 Flame detected out of sequence
106 Flame lost in MFEP
107 Flame lost early in Run
108 Flame lost in run
109 Ignition failed
110 Ignition failure occurred
111 Flame current lower than WEAK threshold
112 Pilot test flame Timeout
113 Flame circuit timeout
122 Light off rate proving failed
123 Purge rate proving failed
124 High fire switch OFF
125 High fire switch stuck ON
126 Low fire switch OFF
127 Low fire switch stuck ON
128 Fan speed failed during prepurge
129 Fan speed failed during preignition
130 Fan speed failed during ignition
131 Fan movement detected during
Standby
132 Fan speed failed during run
136 Interrupted Airflow Switch failed to
Close
137 ILK failed to close
149 Flame detected
150 Flame not detected
151 High fire switch ON
3. If previous steps are correct and fault persists, consult
factory.
1. Check wiring and correct any possible errors.
2. Replace the header sensor.
3. If previous steps are correct and fault persists, consult
factory.
1. Check wiring and correct any possible errors.
2. Replace the stack sensor.
3. If previous steps are correct and fault persists, consult
factory.
1. Check wiring and correct any possible errors.
2. Replace the outdoor sensor.
3. If previous steps are correct and fault persists, consult
factory.
Internal Fault.
1. Reset Module.
2. If fault repeats, consult factory.
1. Check that flame is not present in the combustion
chamber. Correct any errors.
2. Make sure the UV flame detector wires are protected from
stray noise pickup.
3. Reset and sequence the module, if code reappears,
replace the flame detector.
4. Reset and sequence the module, if code reappears,
consult factory.
1. Check pilot valve operation. Correct any errors.
2. Check the fuel supply.
3. Check fuel pressure and repeat Pilot tests.
4. Check pilot assembly ignition electrode and flame detector.
5. If steps 1 through 4 are correct and the fault persists,
consult factory.
Hold time of recycle and hold option. Will not be a lockout
fault. Hold Only.
Internal hardware test. Not a lockout.
Interrupted Pilot application and flame lost when system in
"test" mode.
1. Reset the module to restart.
Flame sensed during Initiate or off cycle, hold 240 seconds, if
present after 240 seconds, lockout.
1. Check wiring and correct any potential wiring errors.
2. Check VFDs ability to change speeds.
3. Change the VFD
4. If the fault persists, consult factory.
Internal Fault
1. Reset Module.
2. If fault repeats, consult factory
Internal Fault
1. Reset Module.
2. If fault repeats, consult factory
1. Check wiring and correct any potential wiring errors.
2. Check VFDs ability to change speeds.
3. Change the VFD
4. If the fault persists, consult factory.
Internal Fault
1. Reset Module.
2. If fault repeats, consult factory
1. Check wiring and correct any possible shorts.
2. Check Interlock (ILK) switches to assure proper function.
3. Verify voltage through the interlock string to the interlock
input with a voltmeter.
4. If steps 1-3 are correct and the fault persists, consult
factory.
1. Holds if flame detected during Safe Start check up to
Flame Establishing period.
1. Sequence returns to standby and restarts sequence at the
beginning of Purge after the HF switch opens. If flame
detected during Safe Start check up to Flame Establishing
period.
Internal Fault
1. Reset Module.
104
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Rev 2.1