Figure 3-10. Control box assemb[y and component removal and installation.

Figure 3-10. Control box assemb[y and component removal and installation.

c. Installation. Install the control box assem-

tween pins A, B, and C. Continuity should also

bly, control panel, and panels by reversing the

exist between pins 3 and 4.

order of removal.

c. Removal. Refer to figure 3-10 and remove

the phase sequence relay.

3-26. Phase Sequence Relay

d. Installation. Install the phase sequence

a. General. The phase sequence relay prevents

relay, control box cover, and front access panel

operation of the motor/compressor unit unless the

by reversing the order of removal.

phase sequence is correct. With the control cir-

cuit operating properly, 208 volts of current is

3-27. Circuit Breaker

fed through the circuit breaker auxiliary con-

a. General. The circuit breaker protects the

tacts, relay pins 2 and 3 and the fuses into the

compressor from continuous overload and short

rectifier.

circuits.

b. Testing.

(1) Disconnect the power source.

(1) Remove the front access cover (para

(2) Remove the front access panel (para

3-15) and control box cover (para 3-24).

3-15) and the control box cover (para 3-24).

(2) Refer to figure 3-10 and disconnect the

(3) Refer to the applicable wiring diagram

circuit breaker leads (tag leads for facilitating

(fig. 1-3 or 1-4) and check for continuity be-

3-14