FIGURE 41
8201-164 Compressor Control Module
High Pressure Switch
Compressor Contactor Output
Alarm Output
Common
Delay-on-Break Time
Adjustment Potentiometer
Brownout Ignore Time DIP Switches*
18-30 VAC Input
Y Input from Thermostat
and High Pressure Switch
Troubleshooting Light
* Turn on only one switch for that specific ignore time setting
Jumper
Manual 2100-670I
Page
26 of 47
the compressor. If the switch closes, it will then restart
the compressor after the delay-on-break setting has
expired on the device. If the switch trips again during
the same Y call, the compressor will be de-energized.
The ALR terminal will be energized, signaling the unit
control board that a high pressure event has occurred
(see
Refrigerant High Pressure Alarm
on page 27).
Test Mode
By rapidly rotating the potentiometer (POT) clockwise
(see Figure 41), all timing functions will be removed
for testing.
The conditions needed for the unit to enter test mode
are as follows: POT must start at a time less than or
equal to the 40 second mark. The POT must then be
rapidly rotated to a position greater than or equal to
the 280 second mark in less than ¼ second. Normal
operation will resume after power is reset or after the
unit has been in test mode for at least 5 minutes.
Brownout Protection with Adjustment
Brownout protection may be necessary if the utility
power or generator power has inadequate power to
prevent the voltage from dropping when the compressor
starts. This is rare but can happen if the generator
is undersized at the site or if the site is in a remote
location far from the main power grid. Under normal
circumstances, allowing the brownout to be ignored for
a time period should not be needed. The 8201-164 is
shipped with all the DIP switches in the 'off' or 'do not
ignore' position (see Figure 41).
If ignoring the brownout is needed because of the
above conditions, three preset timers can be set by DIP
switches in order to delay signaling a power brownout
for a specific length of time after compressor contactor
is energized. This allows the compressor a time period
to start even if the voltage has dropped and allows the
voltage to recover. This delay only happens when the
CC terminal energizes. The delay can be set to 500
milliseconds (A DIP switch), 1000 milliseconds (B DIP
switch) or 1500 milliseconds (C DIP switch); time is
not cumulative—only the longest setting will apply. If
the voltage recovers during the brownout time period,
the compressor will start.
If a brownout condition is detected by the 8201-164,
the troubleshooting light will flash blue. The light will
continue to flash until the cooling call is satisfied or
