Johnson Controls METASYS VAV111 User Manual

VAV Controller—Variable Air Volume (VAV) Controller 83
Table 36 lists and describes the errors that may occur while using the
HVAC PRO for Windows commissioning tool with the VAVs over the
Zone Bus. The cause of the error is often a loose or improper connection
between the CBLPRO (AS-CBLPRO), laptop PC, and the controller. A
defective COM port on the laptop could also be at fault. Other times, a
defective controller can cause an error.
Note: It takes ten seconds for a VAV Controller to reset and resume
communication after being downloaded.
An effective troubleshooting technique is to use a CBLCON and observe
its LEDs, which will indicate the problem. You may also try exchanging
the component that you believe is defective with a working component of
the same type.
A noisy wire adjacent to the Zone Bus can also cause communication
errors. Noise can be periodically induced into the Zone Bus, thereby
causing sporadic communication failures between the laptop and the VAV.
Most often, noisy lines cause intermittent disruption, not total loss of
communication.
For more information on the HVAC PRO for Windows, refer to the
HVAC PRO for Windows User’s Manual (FAN 637.5).
Table 36: Communication Errors on Download
Error Number
or Description Cause Description Solution
1
Undefined
command
The device is being sent a message
that contains an invalid command.
5
Invalid
message size
The size of the message sent does
not correspond to the type of
message sent.
Check for tight and proper
connections between the laptop
PC, CBLPRO, and the VAV.
11
Invalid
command
The command issued is not valid for
the data type.
14
Not ready The VAV cannot process this
message at this time. For example,
the EEPROM is not functioning
properly.
Cycle power on the VAV. If
problem persists, return VAV for
repair or replacement.
15
Bad E
2
Write A problem with the EEPROM exists. Return the VAV for repair or
replacement.
16
No
communication
Some hardware problem exists,
such as a loose connection or a
failed component.
Check for tight and proper
connections between the laptop
PC, CBLPRO, and the VAV.
Hardware
Communication
Error
Controller is still in reset mode.
Resetting takes ten seconds after a
download.
Wait ten seconds for the reset
period to expire before trying to
commission the controller.
17
Bad CRC The Cyclical Redundancy Check of
the message received is incorrect
due to an error in transmission.
Check for tight and proper
connections between the laptop
PC, CBLPRO, and the VAV.
18
Invalid
response
The message received is not what
the HVAC PRO for Windows Load
Utility expected.
112F113F114FZone Bus
Troubleshooting
-- HVAC PRO
for Windows

Johnson Controls METASYS VAV111 Specifications

General

Brand	Johnson Controls
Model	METASYS VAV111
Category	Controller
Language	English