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A list of the codes is shown below:
Normal motor off display. Sequentially
HAXXX
sweeps through the motor protector dip
switch setting.
0
Normal - no fault detected (Running)
Flashing "0"
Motor off or unloaded < 5A AC current
level.(Running)
1
High current fault.
Loaded phase to phase current
2
imbalance > 17%.
Unloaded phase to phase current
3
imbalance > 25%.
4
Improper incoming phase rotation.
High motor temperature.
5
Trip point = 13kΩ, reset = 3.25kΩ.
6
Communication error.
7
Unload Balance ( > 50%)
8
Phase Loss ( >60%)
E
Out of range of RLA calibration.
Other symbols Defective module or supply voltage.
Working voltage 18-30VAC, 224VAC nominal.
Low voltage trip = 15VAC.
Whenever a motor protector trips, the motor protector
contacts wired in series with the motor contacts opens
and the motor contactor de-energizes allowing the mo-
tor to stop. The micro senses the low motor current and
shuts the system down. The micro will try two more starts
before locking the system out. The system locks out be-
cause the motor protector is a manual reset device. After
the first start the modules' contacts will be open pre-
venting the motor contactors from energizing. Power
must be removed and reapplied to reset the module.
Current Overload
The 2ACE module design uses one integral current
transformer per phase to provide protection against
rapid current overload conditions. The module responds
to changes in current and must be calibrated using DIP
switches located on the module. Integral trip curves al-
low for in-rush currents during Wye-Delta, part wind,
or ACL starts without nuisance tripping.
To check the factory setting of the 2ACE module current
overload trip value. See Table 1 (page 20).
For the location of the dip switches and determining the
ON position refer to the "Note" below and Figure 51,
page 122.
For the location of the dip switches and determining
the ON side of the switches, refer to Figure 51, page
YORK INTERNATIONAL
122. As indicated, to place a switch in the ON position
requires pushing the switch to the left.
A switch must be pushed to the left to
place the switch in the ON position.
It is recommended that an YORK Ser-
vice Technician or the YORK factory
be consulted before changing these
settings for any reason, since damage
to the compressor could result.
Changes should never be made unless
it is verified that the settings are in-
correct.
Anytime a dip switch change is made,
power must be cycled off and on to the
module to reprogram the module to the
new valve.
Thermal Overload
Three PTC (positive temperature coefficient) ther-
mistors in the motor windings of each phase provides
thermal protection. The sensor resistance stays rela-
Ω
tively constant at 1k
until a temperature of 130ºC
(266ºF) is sensed. The sensor experiences a rapid rise
in resistance beyond this temperature. Whenever the
resistance of one of the sensors reaches 13k
module trips, which ultimately de-energizes the motor's
pilot circuit. Reset is manual after the motor cools and
the sensor resistance drops to 3.25k
Current Imbalance (Loaded & Unloaded) /
Loss of Phase
A 2-second delay at start-up allows for any imbalances
resulting during normal starting conditions. After this
initial delay, the 2ACE module compares the "Operat-
ing Current" to the measured half line current. The "Op-
erating Current" is given by 0.65 x factory overload
current setting.
An unloaded compressor condition occurs when any
measured half line current is less than the "Operating
Current." A current imbalance exceeding an unloaded
level of 25% will result in the motor pilot circuit being
de-energized.
FORM 201.18-NM8
2
Ω
, the 2ACE
Ω
.
19
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