45
Alert Code T415 -- IAQ Input Out of Range
This alert occurs when the IAQ input (on ECB) is less than 3.5 mA
and the sensor is configured as installed. IAQ operation will be
disabled. Check sensor and wiring. This alert clears automatically.
Alert Code T416 -- OAQ Input Out of Range
This alert occurs when the OAQ input (on ECB) is less than 3.5
mA and the sensor is configured as installed. OAQ operation will
be disabled.
Check sensor and wiring. This alert clears
automatically.
Control Module Communication
Red LED
Proper operation of the MBB and ECB control boards can be
visually checked by looking at the red status LEDs. When
operating correctly, the red status LEDs should blink in unison at a
rate of once every 2 seconds. If the red LED on the ECB is not
blinking, check the DIP switch positions on the board. If the red
LEDs are not blinking in unison, verify that correct power is being
supplied to all modules. A blinking red LED at the rate of once per
second means that software is not loaded on the board. Also, be
sure that the board is supplied with the current software. If
necessary, reload current software. A board LED that is lit
continuously should be replaced.
Green LED
The MBB and ECB each have one green LED. The Local
Equipment Network (LEN) LED should always be blinking
whenever power is on. If LEN LED is not blinking, check LEN
connections for potential communication errors (MBB J3, J4, and
J5). Communication between modules is accomplished by a 3-wire
sensor bus. These 3 wires run in parallel from module to module.
The J4 connector on the MBB also provides both power and
communication directly to the Scrolling Marquee display. The J5
connector on the MBB provides a LEN interface at the field
connection terminal (TB).
Yellow LED
The MBB has one yellow LED which is used to indicate CCN
communication activity. The Carrier Comfort Network
®
(CCN)
LED will blink during times of network communication.
Communication Failures
If the Scrolling Marquee or Navigator display Communication
Failure or the green or yellow LED’s do not flash on the boards
then the problem could be the communication chip on one of the
control boards (MBB or ECB). Disconnect all the LEN and CCN
plugs from the board and use an ohm meter to measure the
resistance on the communication pins of the boards to determine if
the board is bad. If the reading is less than half the value indicated
in Table 13, then the board needs to be replaced.
NOTE
: The resistive values should be read when the board is
powered off and the unit is locked out.
Table 13 – LEN and CCN Communication Resistances
Device
Board Serial
Number
(LEN) Resistance between Pins/Connector
(CCN) Resistance between Pins/Connector
Pins 1 to 3
Pins 1 to 2
Pins 2 to 3
Pins 5 to 7
Pins 5 to 6
Pins 6 to 7
MBB
Prior to 4702N
15K
Ω
J3, J4, & J5
7.5K
Ω
J3, J4, & J5
7.5K
Ω
J3, J4, & J5
15K
Ω
J5
7.5K
Ω
J5
7.5K
Ω
J5
Starting 4702N
18.9K
Ω
J3, J4, & J5
9.9K
Ω
J3, J4, & J5
9.9K
Ω
J3, J4, & J5
18.9K
Ω
J5
9.9K
Ω
J5
9.9K
Ω
J5
ECB
Prior to 0803N
5.9K
Ω
J2
5.2K
Ω
J2
5K
Ω
J2
---
---
---
Starting 0803N
18.9K
Ω
J2
9.9K
Ω
J2
9.9K
Ω
J2
---
---
---
48/
50P
G
and
P
M
Содержание 48/50PG Series
Страница 32: ...32 C07009 Fig 20 Air Baffle Dimensions 48 50PG03 16 48 50PG and PM...
Страница 33: ...33 C08077 Fig 21 Air Baffle Dimensions 48 50PG20 28 and 48 50PM16 28 48 50PG and PM...
Страница 58: ...58 C08549 Fig 28 48PG03 16 Control Wiring Schematic 48 50PG and PM...
Страница 59: ...59 C08550 Fig 29 50PG03 16 Control Wiring Schematic 48 50PG and PM...
Страница 60: ...60 C08551 Fig 30 Typical 48 50PG03 16 Power Wiring Schematic and Legend 48 50PG16 460 3 60 Shown 48 50PG and PM...
Страница 64: ...64 C08471 Fig 34 Typical 48PG and PM16 28 Control Schematic 48PM16 28 Shown 48 50PG and PM...
Страница 66: ...66 C08557 Fig 36 Typical 50PG and PM16 28 Control Schematic 50PG20 28 Shown 48 50PG and PM...
Страница 67: ...67 C08064 Fig 37 Typical 50PG and PM16 28 with Humidi MiZert Control Schematic 50PM16 28 Shown 48 50PG and PM...
Страница 68: ...68 C08558 Fig 38 Typical 48 50PG and PM16 28 Power Schematic 48 50PM16 28 Shown 48 50PG and PM...
Страница 72: ...72 C08565 Fig 42 Typical 48 50PG20 28 Component Arrangement 48 50PG20 24 Shown 48 50PG and PM...
Страница 73: ...73 C08067 Fig 43 48 50PM16 28 Component Arrangement 48 50PG and PM...
Страница 74: ...74 C08562 Fig 44 48 50PM16 28 with Humidi MiZert Component Arrangement 48 50PG and PM...
Страница 208: ...208 48 50PG and PM...