Carrier 48DK024 Controls Operation And Troubleshooting page 20

QUICK
NORMAL
TEST
DISPLAY
STEP NO.
1.4. 1
1.5. 1
1.6. 1
1.7. 1
1.8. 1
1.9. 1
2.0. 1
2.1. 1
2.2. 1
2.3. 1
*Potentiometer P2 is not listed since it is not part of the quick test. If on unit start-up a Code 83 is displayed, check potentiometer P2.
QUICK
NORMAL
TEST
STEP NO.
2.4.
2.5.
2.6.
2.7.
2.8.
2.9. 0 then 1 then 0
3.0.
3.1.
3.2. 0 then 1 then 0
3.3.
CR — Control Relay
*K9 (fan relay) will remain on for duration of quick test.
†Compressor will be energized for 10 seconds. Zero indicates open CR; 1 indicates closed CR.
Table 9 — Quick Test, Thermistor and Potentiometer Check
DESCRIPTION
1 — Thermistor OK
0 — Thermistor Faulty
1 — Thermistor OK
0 — Thermistor Faulty
024-030
1 — Resistor OK
0 — Resistor Faulty
034-074
1 — Thermistor OK
0 — Thermistor Faulty
024-030
1 — Resistor OK
0 — Resistor Faulty
034-074
1 — Thermistor OK
0 — Thermistor Faulty
1 — Thermistor or Potentiometer OK
0 — Thermistor or Potentiometer Faulty or
Option not used
1 — Potentiometer OK
0 — Potentiometer Faulty
1 — Potentiometer OK
0 — Potentiometer Faulty or Option not used
1 — Potentiometer OK
0 — Potentiometer Faulty or Option not used
1 — Potentiometer OK
0 — Potentiometer Faulty or Option not used
1 — Potentiometer OK
0 — Potentiometer Faulty or Option not used
Table 10 — Quick Test, Output Relay Check
DISPLAY
1
1 — Open Economizer or Open Relay if no Economizer
1
1 — Close Economizer or Close Relay if no Economizer
1 — Energize Fan Relay and Heat Relay
1
1
Energize Stage 1 Condenser Fan(s)
1
Energize Stage 2 Condenser Fan(s) — 034-074 Only
Energize Compressor 1†
0
Energize Unloader 2 (024-034, 054-074); Not Used (044)
0
Energize Unloader 1
Energize Compressor 2†
0
Not Used
Leaving Air
Thermistor (T1)
Entering Air
Thermistor (T2)
Circuit 1 Condenser Thermistor
(T3) or Resistor
Circuit 2 Condenser Thermistor
(T4) or Resistor
Accessory Space Temperature Thermistor (T10)
or Accessory Reset Potentiometer (P7)
Supply-Air Set Point
Potentiometer (P1)
Accessory Reset Limit
Potentiometer (P3)
Accessory Demand Limit
Potentiometer (P4)
Minimum Position
Economizer
Potentiometer (P5)
Warm-Up Set Point
Potentiometer (P6)
DESCRIPTION
20
THERMISTOR OR
POTENTIOMETER*
RELAY NUMBER
K7
K8
K9* and K10
K11
K12
K1
K2
K3
K5
K6