VFD Parameter Configuration Guide (Form No: X3900-3618-010-H)
Important: Follow the listed sequence below when updating VFD parameters.
1. Replacement Fuse Size Specifications
Use this table to find the correct Class J replacement fuse size based on the Motor Horsepower (HP) and incoming voltage:
| Motor HP | Voltage | Class J Replacement Fuse Size (A) |
|---|---|---|
| 3 HP | 208–230 V | 30 |
| 3 HP | 460 V | 15 |
| 3 HP | 575 V | 15 |
| 5 HP | 208–230 V | 45 |
| 5 HP | 460 V | 25 |
| 5 HP | 575 V | 20 |
| 7.5 HP | 208–230 V | 60 |
| 7.5 HP | 460 V | 30 |
| 7.5 HP | 575 V | 25 |
2. Standard VFD Parameter Settings
| Parameter | Parameter Description | Parameter Setting |
|---|---|---|
| 0-01.00 | Language | English |
| 0-03.00 | Regional Settings | North America |
| 0-20.00 | Display Line - 1.1 Small | Analog Input 53 |
| 0-22.00 | Display Line - 1.3 Small | Input Power [hp] |
| 0-40.00 | [Hand on] - Key on LCP | Disable |
| 1-03.00 | Torque Characteristics | Auto Energy Optim. VT |
| 1-73.00 | Flying Start | Enabled |
| 1-90.00 | Motor Thermal Protection | ETR Trip 1 |
| 2-00.00 | DC Hold / Preheat Current | 0 |
| 2-01.00 | DC Brake Current | 0 |
| 2-04.00 | DC Brake Cut In Speed [HZ] | 10 |
| 3-41.00 | Ramp 1 Ramp up Time | 10 |
| 3-42.00 | Ramp 1 Ramp down Time | 30 |
| 4-12.00 | Motor Speed Low Limit [HZ] | * 38 Hz (Std Eff or Reheat Units with 2-Speed Motor / Single-Zone VAV) * 35 Hz (Std Eff or Reheat Units with Multi-Zone VAV) * 30 Hz (High Eff Units with 2-Speed Motor / Single-Zone VAV / Multi-Zone VAV) * 15 Hz (Ultra High Eff Units) |
| 4-16.00 | Torque Limit Motor Mode | 150 |
| 4-18.00 | Current Limit | 115 |
| 5-12.00 | Terminal 27 Digital Input | Coast Inverse |
| 6-14.00 | Terminal 53 Low Ref./Feedb. Value | * 38 Hz (Std Eff or Reheat Units with 2-Speed Motor / Single-Zone VAV) * 35 Hz (Std Eff or Reheat Units with Multi-Zone VAV) * 30 Hz (High Eff Units with 2-Speed Motor / Single-Zone VAV / Multi-Zone VAV) * 15 Hz (Ultra High Eff Units) |
| 14-01.00 | Switching Frequency | 8.0 kHz |
| 14-04.00 | PWM Random | On |
| 14-12.00 | Function at Mains Imbalance | Derate |
| 14-20.00 | Reset Mode | Automatic Reset x 3 |
| 14-50.00 | RFI Filter | Off |
| 14-60.00 | Function at Over Temperature | Derate |
| 14-61.00 | Function at Inverter Overload | Derate |
3. Motor-Specific Dependent Parameters (1-21.00 to 1-25.00)
| Parameter | Parameter Description | 3 HP (208 V) | 3 HP (460 V) | 3 HP (575 V) | 5 HP (208 V) | 5 HP (460 V) | 5 HP (575 V) | 7.5 HP (208 V) | 7.5 HP (460 V) | 7.5 HP (575 V) |
|---|---|---|---|---|---|---|---|---|---|---|
| 1-21.00 | Motor Power [HP] | 3 | 3 | 3 | 5 | 5 | 5 | 7.5 | 7.5 | 7.5 |
| 1-22.00 | Motor Voltage | 208 | 460 | 575 | 208 | 460 | 575 | 208 | 460 | 575 |
| 1-23.00 | Motor Frequency | 60 Hz | 60 Hz | 60 Hz | 60 Hz | 60 Hz | 60 Hz | 60 Hz | 60 Hz | 60 Hz |
| 1-24.00 | Motor Current | 10.2 | 5.0 | 4.0 | 14.4 | 6.6 | 5.3 | 20.9 | 9.5 | 7.8 |
| 1-25.00 | Motor Nominal Speed | 1725 | 1725 | 1725 | 3450 | 3450 | 3450 | 3470 | 3470 | 3470 |
WARNING:
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.