Honeywell W7340 사용자 설명서

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W7340, W7345 COMMUNICATING ECONOMIZER LOGIC MODULES
11
63-2569—04
TROUBLESHOOTING
The status LED is visible through a hole in the device cover. A 
priority-based LED flash sequence indicates a detected fault. 
0.25 seconds elapses between each pulse, a higher pulse 
count indicates higher priority. A two-second on period 
precedes each repeated sequence.
The diagnostic bit position corresponds to the Modbus 
diagnostic register. The diagnostic bit resets when the 
respective fault is present. To read all active faults, read the 
diagnostic register via Modbus function code 8 (no flash 
priority needed).
NOTES:
All pulse counts (Table 4) are based on the 
number of times the light pulses off.
In the event of a Communications Failure, the LED 
pulses on for 0.25 seconds every 2 seconds.
Table 4. W7340 Economizer Checkout.
Description
Pulse 
count
Diagnostic 
bit
Booting (0-3 min. after power-up)
NA
12
Mixed air temperature sensor fault
8
7
Outdoor air temperature sensor fault
7
6
Outdoor air humidity sensor fault
6
5
Return air temperature sensor fault
4
3
Return air humidity sensor fault
3
2
Indoor air quality sensor fault
2
1
Actuator fault
1
0
Proper operation (outdoor air 
appropriate for free cooling)
Solid 
ON
NA
Proper operation (NO free cooling)
2 Hz flash
NA
Communications failure
1 (pulses 
on)
NA