Table 17 — Control Board LED Alarms
LED
BLINKS
ERROR
CODE
DESCRIPTION
TROUBLESHOOTING
COMMENTS
1 — Normal Operation
The expansion board and control board flash the red LED in one-second intervals when the board is
operating properly.
2 HF-13 Compressor 1 Safety
The high or low pressure safety switch for compressor no. 1 has opened for 3 seconds. The error will
be cleared and compressor no. 1 will be allowed to turn on in 15 minutes. If the safeties have been
tripped 3 times in 90 minutes, compressor no. 1 will be locked out until the control board has been
manually reset.
3 HF-14 Compressor 2 Safety
The high or low pressure safety switch for compressor no. 2 has opened for 3 seconds. The error will
be cleared and compressor no. 2 will be allowed to turn on in 15 minutes. If the safeties have been
tripped 3 times in 90 minutes, compressor no. 2 will be locked out until the control board has been
manually reset.
4 HF-15 Thermostat Failure
The thermostat is calling for both heating and cooling at the same time. The unit will operate on a first
call basis and will automatically reset.
5 HF-05 SAT Thermistor Failure The supply-air temperature (SAT) sensor has failed. First check for wiring errors, then replace sensor.
6 HF-06 OAT Thermistor Failure The outside-air temperature (OAT) sensor has failed. First check for wiring errors, then replace sensor.
7 HF-03 Space Temp. Sen. Failure The space temperature sensor has failed. First check for wiring errors, then replace sensor.
8 HF-12 RAT Thermistor Failure
The return-air temperature (RAT) sensor has failed. Ensure that DIP switch position 1 is in the closed
position and reset power. Then check for wiring errors. Finally, replace sensor.
9 SE-05
Loss of Communications
with Expansion board
Communications between the expansion board and the control board have been interrupted. Ensure
that an expansion board is installed and wired using the wire harness supplied with the expansion
module. If an expansion board is not used ensure that DIP switch position 3 is in the closed position,
and reset power.
10 HF-16 Control Board Failure Generated when hardware has failed on control board. Replace the control board.
11 HF-17 Expansion Board Failure
Generated when hardware has failed on the expansion board.
Replace the expansion board.
LEGEND
DIP — Dual In-Line Package
LED — Light-Emitting Diode
Table 18 — I/O Channel Designations
Base Module
TERMINAL
NO.
ASSIGNMENT
T1-2 SPT (CCN) — 10KV Thermistor
T3-4 STO (CCN) — 10KV Thermistor
T5-6 OAT — 5KV Thermistor
T7-8 SAT — 5KV Thermistor
T9-10 —
T11-12 —
T13-14 —
T15-16 —
T17-25 Y1 — DI (24 vac)
T18-25 Y2 — DI (24 vac)
T19-25 W1 or Remote Start/Stop — DI (24 vac)
T20-25 W2 — DI (24 vac)
T21-25 G — DI (24 vac)
T22-25 Compressor 1 Safety — DI (24 vac)
T23-25 Compressor 2 Safety — DI (24 vac)
T24-25 Outside Air Enthalpy — DI (24 vac)
T26-27 Economizer Pos. — AO (4-20 mA)
T28-29 Heat 1 Relay — DO (24 vac)
T30-29 Heat 2 Relay — DO (24 vac)
T31-32 Power Exhaust 1/Modulating Pwr Exht — DO (115 vac)
T33-32 Power Exhaust2—DO(115vac)
T34-35 Condenser Fan — DO (115 vac)
T36-35 OFC2 — DO (115 vac)
T37-38 Reversing Valve Solenoid No. 1
T39-38 Reversing Valve Solenoid No. 2
K1 Indoor Fan Relay — DO (LV)
K2 Compr.1—DO(HV)
K3 Compr.2—DO(HV)
LEGEND
AO — Analog Output OAT — Outdoor-Air Temperature
CCN — Carrier Comfort Network OFC — Outdoor Fan Contactor
DI — Direct Input SAT — Supply-Air Temperature
DO — Direct Output SPT — Space Temperature
HV — High Voltage STO — Space Temperature Offset
KV — Kilo-Ohms T—Terminal
LV — Low Voltage
NOTE: For all 4 to 20 mA signals, all even numbered terminals are negative (−)
polarity, and all odd numbered terminals are positive (+) polarity.
Table 19 — I/O Channel Designations Expansion
Module
TERMINAL
NO.
ASSIGNMENT
T1-2 —
T3-4 —
T5-6 —
T7-8 —
T9-10 —
T11-12 IAQ Indoor — AI (4-20 mA)
T13-14 IAQ Outdoor — AI (4-20 mA)
T15-16 —
T17-25 Fan Status — DI (24 vac)
T18-25 Filter Status — DI (24 vac)
T19-25 Field Applied Status — DI (24 vac)
T20-25 Demand Limit — DI (24 vac)
T21-25 Fire — Unit Shutdown — DI (24 vac)
T22-25 Fire — Pressurization — DI (24 vac)
T23-25 Fire — Evacuation — DI (24 vac)
T24-25 Fire — Smoke Purge — DI (24 vac)
T26-27 —
T28-29 —
T30-29 Alarm Light Indicator — DO (24 vac)
T31-32 Power Exhaust Fire #1 — DO (115 vac)
T33-32 Power Exhaust Fire #2 — DO (115 vac)
T34-35 Power Exhaust Fire #3 — DO (115 vac)
T36-35 Power Exhaust Fire #4 — DO (115 vac)
T37-38 —
T39-38 —
K1 —
K2 —
K3 —
LEGEND
AI — Analog Input
DI — Direct Input
DO — Direct Output
IAQ — Indoor Air Quality
T—Terminal
NOTE: For all 4 to 20 mA signals, all even numbered terminals are negative (−)
polarity, and all odd numbered terminals are positive (+) polarity.
36
To Next Page
Loading...
