System Alarms
A09 is only available when DC Failover Box (ASPCB.24/48) is installed. The controller will not operate compressor or heater when the DC Failover Box is acti...
Wed, Feb 28, 2018 at 8:20 PM
The normally closed evaporator overload feedback relay opens between terminals 5 & 9 when either the supply fan has been physically blocked or when it d...
Wed, Feb 28, 2018 at 8:20 PM
If the air filter is dirty, excess pressure will build up across the filter, triggering the normally closed air pressure switch (PF) to open. Troublesh...
Wed, Feb 28, 2018 at 8:21 PM
pLAN is the communication wire between unit 1 and unit 2 controller board. The units will act independently when the communication is lost. Troubleshoot...
Wed, Feb 28, 2018 at 8:21 PM
Clock Card Alarm occurs when the clock card is loose or its battery has drained. Clock card is able to track system time even when the system is not powered...
Wed, Feb 28, 2018 at 8:21 PM
In software versions 13B40 and below, the Humidity Sensor Alarm occurs when the humidity exceeds 90% or when the sensor is disconnected. Humidity alarm only...
Wed, Feb 28, 2018 at 8:21 PM
Temperature sensor alarms occur when the sensor is defective or disconnected. Temperature sensors are not polarized and therefore can be connected in either...
Wed, Feb 28, 2018 at 8:21 PM
The Two Compressor Run alarm occurs whenever the two units are required to use mechanical cooling at the same time. This alarm is an early warning that one ...
Wed, Feb 28, 2018 at 8:22 PM
The controller verifies proper damper positioning by comparing the supply air temperature with the outdoor and indoor temperature. If the damper is complete...
Wed, Feb 28, 2018 at 8:22 PM
The controller receives a normally open signal (can be changed to normally closed at DGt under the D Menu) from the generator or ATS between terminals 42 an...
Wed, Feb 28, 2018 at 8:22 PM