Control Panel Component - Daikin RoofPak RPS Series Installation And Maintenance Manual

Control Panel Component

Manual Motor Protector (MMP)
If an overload or a fault current interruption occurs, check
circuits to determine the cause of the interruption.
If a fault condition exits, examine the controller. If damaged,
replace it to reduce the risk of fire or electrical shock.
The manual motor protector (MMP) provides coordinated
branch circuit, short circuit protection, a disconnecting means,
a motor controller, and coordinated motor overload protection.
A short circuit indicator with manual reset is mounted along
side of each MMP as a means to differentiate between a short
circuit and overload trip conditions.
The MMP trip points are factory set. Do not change unless
the motor ampacity changes or the MMP is replaced with
a new device with incorrect setpoint adjustment. Any other
non-authorized trip point or setpoint adjustment voids all or
portions of the unit's warranty. Authorized setpoint adjustment
is accomplished as follows
1. For motors with a 1.15 service factor, rotate the arrow on
the dial to correspond to the motor FLA (see
2. For motors with a 1.0 service factor, multiply the
motor FLA by 0.9; then rotate the arrow on the dial to
correspond to that value.
To reset a tripped MMP, clear the trip by rotating the knob
counterclockwise to the OFF position; then rotate knob
clockwise to the ON position (see
Other MMP features:
• Three-position rotary operator: OFF-TRIP-ON (see
127).
• Lockout—tagoutable rotary operator: turn the rotary
operator to the OFF position (o), slide out the extension
arm, and insert a lockout pin.
• Ambient compensated -20°C to +40°C.
• Single-phase sensitivity: if one phase exceeds setpoint,
all three phases open.
• Trip test: insert a 9/64" screw driver in the test slot to
simulate a trip (see Figure
Figure 127: Manual Motor Protector
IM 926-3 • ROOFPAK APPLIED SYSTEMS
WARNING
Figure
Figure 127).
127).
Circuit Breaker
Circuit breakers are installed upstream of all VFDs to provide
short circuit protection. These breakers are not adjustable.
To reset a tripped circuit breaker: Clear the trip by rotating the
lever down to the OFF position (see
lever up to the ON position.
Breakers, like MMPs, have three distinct modes of operation
which are clearly indicated by the handle position. The positions
are ON (usually up, OFF (usually down), and TRIPPED
(midway). Some circuit breakers may have a push-to-test button.
Reset After Tripping Information
If a circuit breaker has tripped due to an overload or a fault
current (short circuit), p ior to resetting, the connected wiring
circuits must be checked to determine the cause of the
interruption.
127). In certain applications the circuit breaker may be mounted
upside down. Therefore, when the handle is in the DOWN
position it may not be turned OFF. The handle position
corresponds to ON and OFF text clearly printed on the face
of the unit. Be sure the mounting orientation and desired
handle position is verified prior to performing service on the
equipment. Only qualified service personnel should work
on this equipment. Improper position of the breaker handle
during service may result in electric shock or death.
Figure
If a breaker is tripped e handle/lever will be halfway between
the OFF and ON positions. To reset a tripped circuit breaker:
1. Press the handle or rotate the lever to the OFF position.
2. Press the handle or rotate the lever the opposite
direction to the ON position.
Figure 128: Circuit Breaker
114
Maintenance and Service
Figure 128). Then rotate
CAUTION
WARNING
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