Field Configuration and Testing | FAN MOTOR CONTROL (A177) OPERATION, AND | |
TROUBLESHOOTING | ||
This section provides procedures for configuring, | ||
This section provides information concerning operation | ||
adjusting and testing various components of this unit. | and testing of the fan control. | |
S Fan Motor (B4) Testi Procedure | Fan Motor Control Sequence of Operation | |
S Fan Motor Control (A177) Configuration and Testing | During start up, the following sequence is followed: | |
| ||
S Top Grille and Fan Motor Mounting Adjustment (Fan | 1. Display error conditions (see table 17), if present. | |
2. If no errors are detected, the LED code indicating | ||
Clearance) | ||
stage operation (see table 18) will display the | ||
| ||
S Heat Pump Control (A175) Unit Nominal Capacity | applicable code and then a long pause. | |
Code configuration | 3. The fan motor speed / RPM (revolutions per minute) | |
FAN MOTOR (B4) TEST PROCEDURE | indicator is displayed next (see table 16). | |
The following procedure can be used to test the fan | 4. There is a short pause. | |
| ||
motor operation. A fully charged 9V battery will be | The above sequence will continue to repeat if a thermostat | |
required for this procedure. See figure 31 for complete | demand is present. See figure 32 for LED sequence and | |
test procedure. | table 18 for description of flash and pause durations. |
This is a test that will verify that the motor does operate. 1. Verify main (240 volt) power if OFF to unit.
2. Remove both wires (brown and black) from the J2 terminal on the fan motor control (A177).
3. Room thermostat should be in OFF position (unit in idle mode − no heating or cooling demands)
4. Turn main power (240 volt) ON to unit.
5. Connect 9 Volt battery to fan motor plugs as noted in picture below.
6. Fan motor should run at a reduced fan speed.
7. If fan motor does not run, then replace fan motor assembly.
FAN MOTOR CONTROL | BLACK LEAD |
| |
| BROWN LEAD |
REMOVE BOTH LEADS FROM J2 TERMINALS
BLACK LEAD
BROWN LEAD
J2
FAN PWM OUT PARK COM
BLACK LEAD | BROWN LEAD |
|
CONNECT B4 FAN MOTOR
WIRE TO 9V BATTERY
V POSITIVE TERMINAL
CONNECT B4 FAN
MOTOR BLACK COMMON
WIRE TO 9V BATTERY
NEGATIVE TERMINAL
NEGATIVE TERMINAL | POSITIVE TERMINAL |
|
FULLY CHARGED 9V BATTERY
Figure 31. Fan Motor (B4) Test
Page 45
XP17 SERIES
