Enviro VB09-36, Installation Operation & Maintenance, Page: 32 / 40

FORM ET145.18-IOM1 (115)
ENVIRO-TEC 32
Current alarms or active restrictions are flashed on the
microprocessor control LED.
1. Last Error – When this button is pressed and released
one time within five seconds, it flashes the last five fault
codes on the board’s LED. The most recent alarm is
shown first and the oldest alarm is shown last.
2. Test Reset – When this button is pressed and released
one time with five seconds, any anti-anti-short cycle delay
(ASCD) is bypassed for one cycle.
3. Comm Set UP – If the board is to be networked with other
units, this button is used to set the network address.
The first time the button is pressed within five seconds, it
scans the bus, and then assigns itself the first available
address, (starts at 2).It then flashes that address one
time.
Pressing the button two times within five seconds causes
the control to flash the address.
Communication
The communication protocol is MODBUS using the RTU
method of packet framing at 19200-baud rate.
TABLE 6 – Flash Codes
Flash Codes Description
On Steady Control Failure – Replace Control
Heart Beat Normal Operation
2 Flashes Control Waiting on ASCD
1
(Anti-Short Cycle Delay)
3 Flashes HPS1 – Compressor Lock out
5 Flashes LPS1 – Compressor Lock out
13 Flashes Compressor Held OFF due to Low Voltage
1
14 Flashes EEPROM Storage Failure (Control Failure)
15 Flashes Condensate Overflow Switch – Compressor Lock out
16 Flashes Coaxial Freeze Thermostat – Compressor Lock out
1. These flash codes do not represent alarms.