SPECIFICATIONS
Electrical Ratings [@ 77oF (25oC)]: |
|
|
Rated Voltage | . | 24 VAC |
Rated Voltage Range |
| |
Max. Power Consumption @ 24 VAC . . |
| 4.08 VA |
Nominal Frequency | . 50/60 Hz | |
Relay Load Ratings: |
|
|
Compressor Contactor Relay . . . |
| 0 VA in rush, 6 VA holding |
Fan Relay | . 1/2 HP @ 240, 1/4 HP | |
|
| @ 120 VAC |
Reversing Valve Relay (RV) . . . | . | 24 VA |
Auxiliary Heat Relay (D) |
| 1 Amp. 0.6 P.F. |
Operating Temperature Range |
| |
Humidity Range |
| 5% to 95% relative humidity |
|
| |
High Pressure Cutout Switch (HPC) . . . |
| 18 VAC |
Low Pressure Cutout Switch (LPC) . . . . 18 VAC
Timing Specifications @ 60Hz*
| Nom | Units |
|
|
|
Defrost Lockout Time | 34 | Mins. |
|
|
|
Maximum Defrost Time | 14 | Mins. |
|
|
|
Transient Delay (Normal) | 2 | Mins. |
|
|
|
Back to Back Transient |
|
|
Delay | 4 | Mins. |
|
|
|
Maximum Frosting Time | 6 | Hrs. |
|
|
|
Short Cycle Lockout Time | 5 | Mins. |
|
|
|
Noise Abatement Time |
|
|
(Normal | 30 | Sec. |
|
|
|
Noise Abatement Time |
|
|
(Forced Defrost) | 5 | Sec. |
|
|
|
*50Hz Timings are 20% longer.
OPERATION
Each controller has 24 VAC input and B, Y, and D terminals for connection to a standard thermostat. The controller has pins for connection of two temperature sensors to measure ambient and coil temperature, as well as connections for high- and
The 47D43 provides two LEDs for status and fault indication.
Option Switch
Switch labeled SW1 is used to select the defrost mode termination temperature of outdoor coil. Defrost mode is terminated when the coil temperature exceeds the selected termination temperature. Temperature options for SW1 switch settings are:
|
|
|
|
|
|
| B | A |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| On | Off | 50o F |
|
|
|
|
|
|
| |||
|
|
|
|
|
|
| |||
|
|
|
|
|
|
| |||
|
|
|
|
|
|
| |||
| B | A |
|
| |||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Off | On | 60o F |
|
|
|
|
|
|
| |||
|
|
|
|
|
|
| |||
|
|
|
|
|
|
| |||
|
|
|
|
|
|
| |||
| B | A |
|
| |||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| On | On | 70o F (default) |
|
|
|
|
|
|
| |||
|
|
|
|
|
|
| |||
| B | A |
|
| |||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Off | Off | 80o F |
|
|
|
|
|
|
| |||
|
|
|
|
|
|
| |||
|
|
|
|
|
|
| |||
| B | A |
|
| |||||
|
|
|
|
|
|
|
|
|
|
Test Pins
The pins labeled TEST can be used to change operation mode in the field. Momentarily short the test pins to force the system into the defrost mode. Momentarily short the test pins again to terminate the defrost mode. To avoid unnecessary system mode transition, do not use the test pins frequently.
Diagnostic Features
The control continuously monitors system operation. If a fault occurs, the two LEDs on the control will indicate a diagnostic code, if more than one fault occurs, only the code with the higher priority will be shown.
The table shows the diagnostic codes.
|
| Fault | Display |
LED #1 | LED #2 | Indication | Priority |
|
|
|
|
Off | Off | No power | 0 |
|
|
|
|
On | On | Coil sensor failure | 4 |
|
|
|
|
|
| Ambient sensor |
|
Off | On | failure | 3 |
Flash* | Flash* | Normal | 1 |
|
| Low pressure |
|
Off | Flash* | lockout | 7 |
|
|
|
|
|
| High pressure |
|
Flash* | Off | lockout | 8 |
|
|
|
|
|
| Low pressure |
|
On | Flash* | switch open | 5 |
|
| High pressure |
|
Flash* | On | switch open | 6 |
|
|
|
|
On | Off | Defrost mode | 1 |
|
|
|
|
Alternating Flash | 2 | ||
|
|
|
|
*The flash time is to be 0.5 seconds on and 0.5 seconds off followed by 2 seconds off.
2