Check CDCON2 Coil
engine
Description
Condenser fan motor contactor CDCON2 circuit is shorted or open, and the unit gives alarm only.
Activation Conditions
Condenser fan motor contactor (CDCON2) circuit is shorted or open.
Unit Behavior
Engine and Electric Operation: Alarm only.
Reset Conditions
Auto Reset or alarm may be manually reset via keypad or by turning the unit off, then back on again.
Corrective Actions
1. Check CDCON a. Inspect condenser fan contactor coil and terminals. Verify there is no damage to coil, and no damage or corrosion at terminals. b. Check contactor coil resistance. Refer to Section 2.11 for correct electrical values. Cannot be opened (infinite ohms), shorted (Zero Ohms) or shorted to ground. 2. Check CDCON Using Component Test Mode a. Use Component Test mode to energize CDCON. (Refer to Section 5.2.4.) Verify Current Draw on Component Test mode screen. Refer to Section 2.11 for correct electrical values. b. Check coil voltage between A1 and A2. Verify 12 VDC between A1 and A2. c. Check resistance at contacts. Verify contacts are closed at L1-T1, L2-T2, L3-T3. 3 Check CDCON1 Wiring Inspect harness & control box connector pins & terminals. (See wiring schematic Section 10.2) Verify there is no physical damage to harness, and no damage, moisture, or corrosion in connectors. 3. Check PSCON1 and PSCON2 - Inspect harness & control box connector pins & terminals. PM31 to CDCON2-A1 and PM-34 (feedback); CDCON2-A2 to ground. (See wiring schematic Section 10.2) Verify there is no physical damage to harness, and no damage, moisture, or corrosion in connectors.