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Airflow Adjustment
N N o o t t e e : : All A5AHC model air handlers have been factory
configured to provide sufficient airflow to dilute
leaked refrigerant.
Verification of Mitigation
Actions
After installation, the installer must verify that the
refrigerant leak detection system actuates all mitigating
actions listed above.
The test can be initiated by shorting the two test pins
on the header of the mitigation control board inside of
the unit. The mitigating actions will continue for
approximately 5 minutes. See
Figure 1. AHC Board
Short these pins to test the
refrigerant detection system
If any of the mitigating actions are not actuated by the
system during the test, please check the following:
•
All field wiring connections should be checked
against the diagrams in the
Diagrams," p. 17
section of this manual.
18-GF81D1-1A-EN
Figure 1, p. 11
below.
Amber and Green LED
diagnostic indicators
"Field Wiring
R R e e f f r r i i g g e e r r a a n n t t L L e e a a k k D D e e t t e e c c t t i i o o n n S S y y s s t t e e m m
•
The diagnostic indicators on the mitigation control
board should be checked against the diagnostic
codes given in below.
•
Scan the QR code below for more information on
field troubleshooting of the refrigerant leak
detection system.
Table 4. MCB Diagnostic Code Table
Condition
Idle or Off
Startup
No Active Alarm
Active Alarm (Refrigerant
Leak, Sensor Communication
Error, or Sensor Error)
Past Refrigerant Detected
Alarm
Past Sensor Communication
Error
Past Sensor Error
N N o o t t e e : : Amber LED diagnostic indicator should always
be "ON".
Green LED
Off
On
Slow Flash
3 Flash
4 Flash
5 Flash
6 Flash
11
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