Integrated Staging Control (Isc) Board - Carrier WeatherExpert 48LC 14 Series Service And Maintenance Instructions

Integrated Staging Control (ISC) Board

DDC
Control
DDC
Control
Occupancy
Status Code LEDs
Thermostat
ERROR #
Check Smoke Detector/PMR/AUX
1
Check HPS/LPS/COFS
2
Call for Y3 with no call for Y1. Check Y1 wiring.
3
Call for Y3 with no call for Y1/Y2. Check Y1 wiring.
4
Call for Y2 with no call for Y1. Check Y1 wiring.
5
Call for W2 with no call for W1. Check W1 wiring.
6
Call for heat (W1/W2) and cooling (Y1/Y2/Y3). Check thermostat wiring.
7
Call for heat (W1/W2) with no IFM. Check G wiring.
8
Call for cooling (Y1/Y2/Y3) with no G. Check G wiring.
9
Call for heat (W1/W2) and cooling (Y1/Y2/Y3) with no G.
10
Check thermostat and G wiring.
Check ISC Board and the thermostat wiring.
11
Call for Economizer Y1 Feedback (ECON) from economizer with no call for Y1 from
12
thermostat. Check thermostat and economizer wiring.
Check ISC Board and the thermostat wiring.
13
Check ISC Board and the thermostat wiring.
14
Check ISC Board and the thermostat wiring.
15
NOTES:
1. Green LED Blinking at 1HZ indicates normal operation.
2. Solid red LED indicates an error exists, see above LED configuration.
Indoor Fan
Economizer "On" Status
Outdoor Fan
Motors
Fig. 43 — Integrated Staging Control (ISC) Board
Table 15 — Status Code Descriptions for ISC Board LEDs
ERROR NAME
IGC Power Phase Phase Auxilary
Board Plug Monitor Monitor Shutdown
Relay Relay
Indoor Fan
Motor
LED01
RED
RED
RED
RED
RED
RED
RED
RED
35
Condensate
Overflow
Remote
Shutdown
Smoke
Shutdown
Smoke
Alarm
Low Ambient
Outdoor Fan
Control
Compressors
Reheat
Low-Pressure
Switch
High-Pressure
Switch
LED INDICATION
LED02 LED03 LED04 LED05
RED
RED
RED
RED RED
RED RED
RED
RED RED RED
Blinking
RED RED RED
Green
RED RED
LED
(Note 1)
RED RED
RED RED
RED
RED
RED RED