Ace Heating Solutions Atlas A050 Operating And Maintenance Manual page 103

50 Modulation fault
51 Pump fault
52 Motor tachometer fault
53 AC inputs phase reversed
58 Internal fault: HFS shorted to IAS
59 Internal Fault: Mux pin shorted
60 Internal Fault: HFS shorted to LFS
61 Anti short cycle
62 Fan speed not Proved
63 LCI OFF
64 PII OFF
65 Interrupted Airflow Switch OFF
66 Interrupted Airflow Switch ON
67 ILK OFF
68 ILK ON
69 Pilot test hold
70 Wait for leakage test Completion
78 Demand Lost in Run
79 Outlet high limit
80 DHW high limit
81 Delta T limit
82 Stack limit
91 Inlet sensor fault
92 Outlet sensor fault
93 DHW sensor fault
2. Check the Module power supply and make sure that
frequency, voltage and VA meet the specifications.
Internal sub-system fault.
1. Review alert messages for possible trends.
2. Correct possible problems.
1. Check the Module and display connections.
2. Check the Module power supply and make sure that both
frequency and voltage meet the specifications.
Internal Fault.
1. Reset Module.
2. If fault repeats, consult factory
Will not be a lockout fault. Hold Only.
1.Check field installed Recycle Interlock switch and wiring to
assure proper function.
2. Check all Limit switches (Burner Cutoff, Gas Pressure,
Drain and Water Flow switches) switches to assure proper
function.
3. Reset and sequence the module; monitor the LCI status.
4. If code persists, consult factory
1. Check field installed Pre-Ignition Interlock switch and wiring
to assure proper functions.
2. Check PII configuration setting.
3. Reset and sequence the module; monitor the PII status.
4. If code persists, consult factory.
Internal Fault
1. Reset Module.
2. If fault repeats, consult factory
1. Check field installed Lockout Interlock switch and wiring to
assure proper function.
2. Check Airflow switch to assure proper function. Adjust the
air
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. Verify Run/Test is changed to Run.
2. Reset Module.
3. If fault repeats, consult factory.
1. Internal Fault. Reset Module.
2. If fault repeats, consult factory.
1. Check for adequate gas supply at the gas inlet.
2. Remove the UV flame detector and clean the lens using a
soft cloth.
3. If previous steps are correct and fault persists, consult
factory.
1. Check wiring and correct any possible errors.
2. Replace the Outlet high limit.
3. If previous steps are correct and fault persists, consult
factory.
1. Check wiring and correct any possible errors.
2. Replace the DHW high limit.
3. If previous steps are correct and fault persists, consult
factory.
1. Check Inlet and Outlet sensors and pump circuits for
proper operation.
2. Recheck the Delta T Limit to confirm proper setting.
3. If previous steps are correct and fault persists, consult
factory.
1. Check wiring and correct any possible errors.
2. Replace the Stack high limit.
3. If previous steps are correct and fault persists, consult
factory.
1. Check wiring and correct any possible errors.
2. Replace the Inlet sensor.
3. If previous steps are correct and fault persists, consult
factory.
1. Check wiring and correct any possible errors.
2. Replace the Outlet sensor.
3. If previous steps are correct and fault persists, consult
factory.
1. Check wiring and correct any possible errors.
2. Replace the DHW sensor.
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Rev 2.1