Cambridge
Air
Solutions
10/31/2022
BACnet
Controller
EVAP
Technical
Manual
Version
4.0.2.0002
TROUBLESHOOTING
The status LEDs indicate power connection and network
communication
Label
Color
Normal State
Description
Power Green On
Steady
On Steady = Power Connected
Off Steady = No Supply Power. Check Output wiring for short circuits and
cycle power to the controller.
Fault Red Off
Steady
Off Steady = No Faults
On Steady = Device Fault: no application loaded; Main Code download
required if controller is in Boot mode, or a firmware mismatch exists
between the PEAK controllers and the ZRF1811 Wireless Field Bus
Router.
Blink - 2 Hz = Download or Startup in progress, not ready for
normal operation
SA Bus
Green
Blink - 2 Hz
Blink - 2 Hz = Data Transmission (normal communication)
Off Steady = No Data Transmission (Auto baud in progress)
On Steady = Communication lost, waiting to join.
FC Bus
Green
Blink - 2 Hz
Blink - 2 Hz = Data Transmission (normal communication)
Off Steady = No Data Transmission (Auto baud in progress)
On Steady = Communication lost, waiting to join.
Mod Bus
Green
Blink - 2 Hz
Blink - 2 Hz = Data Transmission (normal communication)
Off Steady = No Data Transmission (Auto baud in progress)
On Steady = Communication lost, waiting to join.
NOTE:
If the display/buttons do not work there is a ribbon cable under the controller cover that may become
disconnected. Remove the cover and carefully reconnect the ribbon cable.
ALARM MESSAGES
Object
Message
Description
Reset
MV:29537
Outside Air Temperature Sensor Failure
Thermistor on Input #16 open or shorted
Automatic
MV:29536
Supply Air Temperature Sensor Failure
Thermistor on Input #14 open or shorted
Automatic
MV:29538
Zone Temperature Sensor Failure
Thermistor on Input #17 open or shorted
Automatic
MV:29569
Burner Fault
Input #1 open with call for burner
Automatic
MV:29535
Low Water Switch #1 Alarm
(Sensor 1 Alarm)
Input #5 open
Automatic
MV:29555
Low Water Switch #2 Alarm
(Sensor 2 Alarm)
Input #6 open
Automatic
MV:29543
Fan Alarm
(Supply Fan Fault)
Input #2 open with call for fan
Automatic
MV:29571
Heater Lockout Alarm
Input #3 closed
Manual
MV:29570
DAT Low Temp Alarm
(Low Temperature Fault)
Supply air temperature below Low Temp
Cutout Setpoint
Manual
POWER
FAULT
SA BUS
FC BUS
MODBUS