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Table 19. Alert Codes and Troubleshooting
GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat
Alert
Code
Inverter
Flash
Code
Priority
Condition
Actual Displayed
Alert Text
Under dealer
control center >
Notifications
Component or System Operational State and Troubleshooting Tip
How to clear alert code
110
Service
Urgent
GF Low AC Line
Voltage
The component AC line voltage is too low. This alert code may appear during a brownout.
•
It may also occur when line voltage is below its designed operating value.
•
Check and correct the power line voltage.
Automatically clears when the system
detects the issue no longer exists.
111
Service
Urgent
GF Line Polarity
Reversed
The unit is reporting that its power and neutral lines are reversed.
•
Turn off the power to the system and correct the line power voltage wiring.
•
System resumes normal operation five seconds after critical condition is recovered.
Automatically clears when the system
detects the issue no longer exists.
112
Service
Urgent
GF No Ground
Connection
The reporting component cannot find earth ground. The thermostat will shut down the system.
•
Provide proper earth ground to the equipment.
•
System resumes normal operation five seconds after critical condition is recovered.
Automatically clears when the system
detects the issue no longer exists.
113
Service
Urgent
GF High AC
Line Voltage
Line voltage high (voltage higher than nameplate rating).
•
Provide power voltage within proper range.
•
System resumes normal operation five seconds after critical condition is recovered.
Automatically clears when the system
detects the issue no longer exists.
114
Service
Soon/Service
Urgent
AC Line
Frequency /
Distortion Prob
In most cases the errors will have something to do with the transformer(s) phasing, input power or output loading (amperage load).
For the air handler control only, alert code 114 is generated only if the measured line frequency is below 57Hz or above 63Hz and
remains out of range for 10 consecutive seconds. We count power line cycles and determine line frequency every 1 second of time based
on the processor’s quartz crystal oscillator. We have a fair amount of filtering on when we consider a power line cycle to have occurred,
so there would have to be really bad distortion for it to count an extra cycle or miss a real cycle.
Voltage low enough to miss a cycle would generate an alert code 115. There are lots of events, such as power utility substation switching,
that could occasionally make our power line frequency off by one count. These are rare one-time events and I don’t know anything other
than a generator with bad frequency that could cause problems long enough to cause this alert code.
There is a frequency / distortion problem with the power to a specific system component. This alert code may indicate transformer
overloading.
•
Check the voltage and line power frequency.
• Check the generator operating frequency, if the system is running on back-up power.
•
Correct voltage and frequency problems.
•
System will resume normal operation five seconds after fault recovered.
• All applicable system component outputs are disabled – moderate condition.
• After 10 minutes, the priority condition is escalated – critical condition.
•
Damper control module will operate in central mode only until proper voltage is restored or frequency distortion is resolved – moderate
condition.
• If connected to iHarmony, set damper control module transformer jumper to system transformer. Check for proper wiring. Replace
40VAC furnace transformer with 70VAC transformer. Re-commission system.
NOTE:
The unitary control (outdoor unit control board) whether it is a single, two-stage or multi-stage control is not displaying alert code
114.
