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Table 19. Alert Codes and Troubleshooting
Initial notification of critical alerts will pop-up on the home screen and will be listed under notification menu. Minor and moderate alerts are found only under the notification menu. Moderate alerts
are not e-mailed to Homeowners. Dealers will get an email and code can be seen on thermostat under the installer notification section.
NOTE:
Anytime the word
DEVICE
or
DEVICE2
is used in this table, it will be replaced on all alert code notification screens with the actual offending device name, for example, thermostat, heat
pump, etc.).
Alert
Code
Inverter
Flash
Code
Priority
Condition
Applicable
Component
Actual Displayed
Alert Text
Component or System Operational State and Troubleshooting Tip
113
Critical
Furnace
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
Moderate /
Critical
All
communicating
components
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.
•
iHarmony control module will operate in central mode only until proper voltage is restored or frequency distortion is resolved
– moderate condition.
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.
• If connected to iHarmony, set damper control module transformer jumper to system transformer. Check for proper wiring.
Replace 40 VA furnace transformer with 70VA transformer. Recommission system.
115
Critical
All
communicating
components
Low Secondary
(24VAC) Voltage
24VAC power to a system component control is lower than the required range of 18 to 30VAC.
•
Check and correct voltage.
•
Check for additional power-robbing system components (devices) connected to system.
• This alert code may require the installation of an additional or larger VA transformer.
•
Damper control module will operate in non-zone mode until proper voltage is restored.
• Automatically clears when the system detects the issue no longer exists.
