Precor TRM 885.v2 User manual

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Service Manual

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Contents
TRM 800v.2 Series Treadmill........................................................................................................ 7
Lubricants...................................................................................................................................... 7
Electrical Requirements ................................................................................................................ 7
US and Canada power requirements ................................................................................8
PVS (Personal Viewing Systems) Equipped Units ..............................................................9
P80/P82 Console Equipped Units.........................................................................................9
RF (CATV) Requirements .......................................................................................................9
Internet Ethernet Requirements ...........................................................................................9
Power Input ................................................................................................................................. 10
Nominal 120V systems..........................................................................................................10
Nominal 230V systems..........................................................................................................10
Procedure ..............................................................................................................................12
Operation Verification Checklist.................................................................................................. 13
Service Access Codes ................................................................................................................ 14
Accessing the Service Software.................................................................................................. 14
P80 Console ...........................................................................................................................14
Service Access Codes ................................................................................................................ 15
Hardware Validation Settings (51765761) .................................................................................. 15
Club Parameter Settings (5651565)............................................................................................ 16
Information Display (65) .............................................................................................................. 17
Consoles...................................................................................................................................... 19
Basic operation of a console .............................................................................................19
Optional TRM800.v2 Base Consoles ..................................................................................20
Console to Base Communication................................................................................................ 20
Bleed Resistor ............................................................................................................................. 22
A 1MΩ 1500V bleed resistor between the secondary ground and earth ground is
required for voltage stabilization.......................................................................................22
Dynamic Brake (DB) Resistor ..................................................................................................... 22
Dynamic Brake resistor overload detection (Thermal sensing) ...................................22
Dynamic Brake resistor detection circuit. ........................................................................22
Dynamic Brake thermal switch ..........................................................................................23

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Diagnostics and Indicators .......................................................................................................... 23
Motor Controller Light (MCL) Service Status Indicator ..................................................23
Active Status Light (ASL) LED ..............................................................................................23
Drive System Monitoring ............................................................................................................. 24
Input Current Overload Detection....................................................................................24
Input current ..........................................................................................................................24
Input current overload error 36..........................................................................................24
Instantaneous Input Current Overload Detection .........................................................24
Input overload error 35 ........................................................................................................24
Motor Over Temperature Detection.................................................................................24
Motor Current Overload Detection ..................................................................................24
Lift Drive Motor Operation ........................................................................................................... 25
Lift Motor.................................................................................................................................25
Lift accuracy..........................................................................................................................25
Lift Motor Operation.............................................................................................................25
Lift motor overload protection...........................................................................................25
AC Lift System –Motion Control.........................................................................................26
AC Lift System –Position Monitoring..................................................................................27
Drive / Lift System Control ...................................................................................................27
Drive Motor Operation................................................................................................................. 28
AC Drive Motor Controller...................................................................................................28
Auto-Stop ...............................................................................................................................30
Introduction to Treadmill Troubleshooting................................................................................... 31
TRM 800.v2 Status lights- ......................................................................................................31
Active Status Light- ASL .......................................................................................................31
Drive Motor and Input Voltage/Current Measurements- .............................................34
General Troubleshooting Methodology....................................................................................... 35
Troubleshooting Tripped Breakers.............................................................................................. 36
If the unit trips the wall breaker:.........................................................................................36
If the Treadmill breaker (power switch) is tripped: .........................................................37
Troubleshooting No Power to the Console, P10 and P30........................................................... 38
Error Codes ................................................................................................................................. 39
Error Codes.............................................................................................................................40
Error Code Table ...................................................................................................................41
Troubleshooting Input Power & Control Error Codes.................................................................. 45
Error 10 –Line Frequency out of Acceptable Range ....................................................45
Error 11 - Watchdog (Upepr PCA) Low Voltage.............................................................45
Error 12 - Watchdog (Lower PCA) Low Voltage .............................................................46
Error 14 –Fan Fail (Lower PCA)...........................................................................................46
Error 15 –DC Bus Over Voltage..........................................................................................47
Error 16 - A.C. Input Voltage Too Low ...............................................................................48
Error (none) - Key Depressed at Power Up- No Error Code Generated ....................48
Error 80, 81, 82, & 83 –P30/P80 Machine Controls Not Working ..................................49
Troubleshooting the 3 Phase AC Drive Motor System................................................................ 50
Troubleshooting the Drive Motor................................................................................................. 50
Procedure: .............................................................................................................................50
Error 17 –DB Resistor Thermal Trip Software Detection ..................................................54

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Error 85 –No Dynamic Resistor Detected ........................................................................54
Error 19 –PFC Malfunction ..................................................................................................55
Error 20 –Motor will not start / No motor movement detected ..................................55
Error 25 –Lower Drive Hardware Error...............................................................................56
Error 27 - Too Much Drive Motor Current ..........................................................................56
Error 28 - Temperature Too High / Drive Electronics .......................................................57
Error 88 –Temperature Too High / Motor Temperature Switch....................................57
Error 35 - Excessive AC Input Current / Instantaneous...................................................58
Error 36 - Excessive AC Input Current/ Circuit Breaker Trip Prevention .......................58
Troubleshooting the Incline System ............................................................................................ 60
Operation of lift motor for testing:.....................................................................................60
Error 40 - No Lift Motion Detected .....................................................................................60
Troubleshooting Procedures...............................................................................................61
Error 42 - Lift Position Value Out of Range........................................................................62
Error 44 - Un-commanded Lift Motion...............................................................................64
Error 45 - Lift Moving in Wrong Direction...........................................................................64
Troubleshooting Communications Errors.................................................................................... 65
Errors 30 and 32 - Communications Error between Upper and Lower Boards .........65
Error 37 - E-Stop Upper State vs. Lower State Mismatch ...............................................66
Error 86, 87 –Console / Motor Controller Mismatch –P10/P30 Only...........................66
Belt Rating Details....................................................................................................................... 68
Procedure ..............................................................................................................................68
Troubleshooting the Auto Stop Feature ...................................................................................... 69
Troubleshooting Heart Rate Issues............................................................................................. 69
Hand Held Heart Rate Does Not Work .............................................................................69
Wireless Heart Rate Does Not Work...................................................................................70
Possible sources of interference signals include, BUT NOT LIMITED TO: ......................71
Removing the treadmill hood....................................................................................................... 72
Removing and replacing the Deck Trim Landing Strips.............................................................. 73
Removing and replacing the front Corner Cover......................................................................... 74
Removing and Replacing the Side Trim...................................................................................... 75
Removing and replacing the Line Cord, Circuit Breaker or ASL PCB. ....................................... 76
Replacing the Motor Control (MC) Module.................................................................................. 78
Replacing the Drive Motor........................................................................................................... 79
Replacing the Lift motor .............................................................................................................. 80
Replacing the Incline Platform..................................................................................................... 82
Replacing the Take-Up Roller..................................................................................................... 83
Drive Belt and Roller Replacement............................................................................................. 84
Running Belt and/or Deck Replacement..................................................................................... 85
Drive Belt Tension Adjustment.................................................................................................... 88
Running Belt Tension and Tracking Adjustment......................................................................... 90
Tensioning the Running Belt ................................................................................................90
Running Belt Tracking Adjustment.....................................................................................91

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Calibrating the Lift Motor ............................................................................................................. 92
About ........................................................................................................................................... 94
Maintenance Schedule................................................................................................................ 94
Daily............................................................................................................................................. 94
Quarterly..................................................................................................................................98
Running Belt and Deck Cleaning Procedure............................................................................... 99
System Block Diagram - 120 Volt Models................................................................................. 102
FInding Part Numbers........................................................................................................ 103
Exploded View........................................................................................................................... 104
Parts List.................................................................................................................................... 111

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About This Document
Warning:
This service manual is for use by Precor trained service providers only. If you are not
a Precor Trained Servicer, you should not attempt to service any Precor products.
Call your dealer for service.
This document contains information required to perform the majority of troubleshooting and
replacement procedures required to repair and maintain this product.
This document contains general product information, software diagnostic procedures (when
available), preventative maintenance procedures, inspection and adjustment procedures,
troubleshooting procedures, replacement procedures and electrical block and wiring diagrams.
Part No: 20039-180 rev A05
.

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General Information
TRM 800v.2 Series Treadmill
This manual covers service information for the TRM 800 Series Treadmill.
Lubricants
Do not apply any lubricants to the deck and belt. Do not use Wax Blast, silicon sprays, or other
applied lubricants. The use of these lubricants will quickly degrade the low-friction surface of the
deck.
Do not use petroleum based lubricants on mechanical components such as the lift, as this may
result in degradation of nylon gearing mechanisms. Use only synthetic lubricants such as
"Super Lube with Teflon" or "Mobile One Synthetic" grease (RED).
NOTE
Use of unapproved lubricants, cleaners, or solvents may void the treadmill warranty
:
Electrical Requirements
When your equipment is delivered you will receive an equipment power cable that meets your local
electrical code requirements. Precor treadmills must be connected to a 20 amp, individual branch
circuit that can be shared only with one PVS (Personal Viewing System) screen. If you need
additional help with the power connections contact your Precor authorized dealer.
IMPORTANT
note
An individual branch circuit provides a hot conductor and neutral conductor to a
receptacle. The conductors must not be looped, "daisy-chained", or connected to
any other conductors or receptacles. The circuit must be grounded according to
NEC guidelines or local region electric codes..
Note: NEC (National Electric Code) guidelines or local region electric codes must be followed.

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US and Canada powerrequirements
The treadmill base is outfitted with a removable line cord plugged into a power entry socket. This is
designed to accommodate either 120V or 240V NEMA compatible line cords, as well as line cords
for other countries. The diagram below shows a NEMA 20A plug for both 120V and 240V
configurations in the United States.
Power
Equipment voltage
Outlet/Plug type
US & Canada
120VAC, 50/60 Hz
NEMA 5-20R/5-20P
US & Canada
240VAC, 50/60 Hz
NEMA 6-20R/6-20P

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PVS(Personal Viewing Systems)Equipped Units
For equipment fitted with a PVS screen, a separate power connection is required. Using a 20 amp
branch circuit, up to 10 screens can be connected. No other devices except PVS may be
connected to this circuit.
P80/P82 Console Equipped Units
For self-powered equipment fitted with a P80 console, a separate power connection is required.
Using a 20 amp branch circuit, up to ten P80 consoles can be connected. No other devices except
P80 consoles may be connected to this circuit.
RF (CATV) Requirements
Where P80 or PVS screens are used there is a minimum RF power requirement to properly supply
CATV to the screens. We require +5dB to +10dB RF power with a minimum of +40dB C/N Channel
to Noise ratio) at each screen for analog video and -5dB to 0dB for digital video signal. If a wall RF
outlet is to be used to power several screens in a row of equipment there is a minimum RF power
requirement at the outlet of +35dB (at +40dB C/N) for analog video (+25dB for Digital video). RF
signal strength of +35dB can power 17 to 19 screens in a single row when properly tapped out.
InternetEthernetRequirements
It is recommend a dedicated CAT6 Ethernet feed to each equipment location.
Communication Requirements:
512Kb/s up
5-10Mb/s down
Switch Ports: 80, 123, 443
The P80 console uses a security token for communication to Precor servers. The security token is
a hash string that is sent with every API call from the FE’s to the Amazon Cloud.
It originates after the equipment is registered at the location. The P80 issues a ‘Call’ which returns
the registration token and the fitness equipment URL. Every event after that uses the URL and the
token to validate/authenticate communication with the Amazon servers and Preva Business
Systems (PBS).
All communication with our servers is currently done via outgoing (originating from the console)
HTTPS sessions. The P80 utilizes NTP to set its clock and for synchronization. At no time is Precor
connecting to your network to "push" any data. The P80 initiates all data requests.

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Power Input
Nominal120Vsystems
Operating voltage range: 85 –145 VAC
Frequency: 47 –65 Hz
Nominal230Vsystems
Rated operating voltage range: 180 –264 VAC
Precor internal required operating voltage range: 180 –275 VAC with reduced performance
allowed.
Frequency: 47 –65 Hz
120 Vac Systems
120 VAC distribution systems utilize a single pole circuit breaker (hot lead) and a neutral lead
connected to a common neutral (ground) bar. The A.C. safety ground (green wire) is connected to
a separate ground bar in the distribution system.
If it is determined that any of the above electrical conditions are in question, please consult with a
qualified electrician to make appropriate circuit changes.

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Safety Guidelines
Safety guidelines you should know and follow include:
Read the owner’s manual and follow all operating instructions.
Operate the equipment on a solid, level surface.
Visually check the equipment before beginning service or maintenance operations. If it is not
completely assembled or is damaged in anyway, do not attempt to operate the equipment.
When operating the treadmill:
oDo not wear loose clothing.
oDo not wear shoes with heels or leather soles.
oCheck the soles of your shoes and remove any embedded stones.
oTie long hair back.
Do not rock the unit.
Do not stand or climb on the handlebars, display enclosure or cover.
Do not set anything on the handlebars, display enclosure, or cover. Never place liquids on any
part of the treadmill while performing service.
To prevent electrical shock, keep all electrical components away from water and other liquids.
Do not use accessory attachments that are not recommended by the manufacturer-such
attachments might cause injuries.
Removing the hood exposes high voltage components and potentially dangerous machinery.
Exercise extreme caution when you perform maintenance procedures with the hood removed.

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Operation Verification
This section provides a method of checking the treadmill basic operation. Check the treadmill
operation at the end of a maintenance procedure or any time it is necessary to ensure that the
treadmill is operating properly. For a complete guide to all operating parameters, refer to the
Operators Manual.
Procedure
Plug the power cord into the wall outlet and then switch the circuit breaker to the "ON" position.
Press and hold the reset key or the stop button for at least 6 seconds, if errors are present the error
log will be displayed. Make note of all the errors in the error log and odometer reading for which the
error occurred. The odometer in the error log can help you determine age and relevance of the
error.
Enter the Hardware Validation test by entering Diagnostic mode as follows:
oPress either the STOP, PAUSE or RESET buttons and then enter 5,1,7,6,5,7,6,1
Select and run the Display Test, the Keypad Test, and the Heart Rate Test. Verify the following
results.
oLEDs light
oKeys all function
oHeart rate is acquired and displayed
Enter the Machine Tests (submenu) and run the Belt Speed test and the Incline test, verify
following results:
oRunning belt moves and is controlled from 0.5mph to 12.0mph in 0.1 increments.
oLift goes up and down and the A/D value is approximately 6800+/-500 at 0% incline)
Press the reset key to exit diagnostics.
Operate the treadmill in the Manual program. Adjust the speed of the running belt to 2–3mph.
Operate the treadmill for at least 5 minutes while walking on the unit.
Concentrate on the feel of the running belt, the sound of the drive motor and rollers. Be on the alert
for unusual noises, smells or vibrations.
Observe the LED’s on the electronic console. Make sure that each LED lights as the information
corresponding to that LED is displayed on the electronic console.
Press the INCLINE he electronic console. Confirm that the running deck inclines
Press the INCLINE
to a level position and the incline display decrements to 0% as the INCLINE
(Depending on the software configuration of the console, the lowest level of incline might be -3%)
While the unit is running and the running belt is in motion, press the STOP button and verify the
running belt stops.
While the unit is running and the running belt is in motion, pull the ESTOP cord and verify the
running belt stops.

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Press and hold the reset key for at least 6 seconds and look at the error log again. This time look for
any NEW errors displayed resulting from the verification test indicating that the unit
Operation Verification Checklist
Check, record, and then clear any errors in the error log.
Verify that all LEDs function properly during the Hardware Validation Tests.
Verify that all keys on the keypad function properly during the Hardware Validation Tests.
Verify that the heart rate functions normally and displays a valid heart rate.
Verify the running belt drive system functions properly throughout the minimum to
maximum range of control. All drive system components (deck, belts, rollers, IFT) are free of
excessive noise, vibrations, or smells
Verify the Incline A/D value is approximately 6000+/-500 at 0% incline; the incline operates
within the complete range of the lift when the or keys are pressed and is free of
excessive noise or vibrations.
The STOP button stops the running belt from moving.
Pulling the ESTOP cord stops the running belt from moving.
Check for new errors that may have been recorded in the error log during operation
verification of the treadmill.

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Service Access Codes
Included topics:
Service Access Codes
Club Parameter - Settings (5651565)
Information Display (65)
Service Access Codes
The service access codes are utilized on the following consoles:
P10
P30
P80
The service codes access three functional modes, Hardware Validation, Club Parameters, and an
Information Display.
Hardware Validation is a set of functional diagnostic tests that are useful in troubleshooting
problems as well as verifying proper operation.
Club Parameters are sometimes referred to as Club Settings or Workout Parameters and
are used to manage usage of the machine.
Information Display is used to access information such as the odometer, software versions
and error logs.
Accessing the Service Software
Accessing the service code functional modes is accomplished in the same way on the P10 and P30
consoles. The differences in the P80 will be discussed below.
To enter Service Software, press either the STOP or the PAUSE or RESET key followed by a
numeric code for the area of service software you wish to access.
The standard access codes use sequential key presses, not simultaneously holding down multiple
keys. The allowable delay between key presses is short. If too much time is taken between key
presses or the wrong key is pressed, the access procedure will be aborted. If the access is aborted,
it will be necessary to start over from the beginning.
P80 Console
Use the System Settings to test your equipment and set parameters that benefit your users and
your facility.
The Welcome screen will be the first screen you see when you approach the P80 console. Press
the Pause key and continue holding it down while you single press in sequential order an X
configuration on the Volume and Channel key pad (Channel Up, Volume Down,Volume
Up,Channel Down). Release the Pause key when done pressing the arrows.
NOTE
The keypad X configuration sequence should be not faster than 1 second between
each key stroke. Any speed faster than 1 second may result in an unsuccessful access
to the sign-in screen.

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Figure 2: P80 Sign In Access
The sign-in screen will be displayed. Type in the technician access ,5,1,7,6,5,7,6,1, and then touch
OK. The Settings menu will be displayed.
Service Access Codes
Access Code
Heading Name
Function
5,1,7,6,5,7,6,1
Hardware Validation
Running Diagnostic Tests
5,6,5,1,5,6,5
Club Parameters
Changing Machine and /or Workout Parameters
6,5
(P10 & P30 Only)
Information Display
Acquiring Information
Hardware Valid ati on - Diagnost ic Test s ( 51765761)
Hardware Validation Settings (51765761)
The Hardware Validation settings access code is 51765761.
Figure 3: Hardware Validation
Enter Hardware Validation
settings mode.
Press STOP/PAUSE/RESET key, 5, 1, 7, 6, 5, 7, 6, 1
DISPLAY TEST
Steps through a check of all LEDs on console
KEYBOARD TEST
Checks all key actions on console
PVS 10 KEY TEST
Checks all 10 keys
HEART RATE
Simulates heart rate activity

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ACTIVE STATUS LIGHT
Shows current status of light- Hold QuickStart to reset
AS LIGHT BRIGHTNESS
Varies ASL LED brightness from Low, Med, High
MC LIGHT STATE
Shows current state of MC LED-Hold QuickStart to reset
MACHINE TEST
Allows manual operation of machine functions –all tests work
independently of workout limits.
BELT
SPEED
Tests belt speed in 0.1 increments
Displays Input Voltage, Current to the treadmill, and output
voltage, current to the drive motor.
AUTO
STOP
Checks Auto Stop function by averaging footplants
Displays if the user is detected or not detected. Footplant
averaging delay renews with each speed change.
INCLINE
Tests incline/decline
Displays A/D number, Glitches, communication time between
LPCA and UPCA.
STOP KEY
(P10/P30)
Checks Stop Key function
Requires Stop Button press, then Lanyard E-Stop pull and button
reset. Will exit the tests to the Welcome screen.
Club Parameter Settings (5651565)
The Club Parameter settings access code is 5651565.
Figure 4: Hardware Validation
Enter Club Parameter
settings mode (P10& P30)
Press STOP/PAUSE/RESET key, 5, 6 , 5 , 1 , 5 , 6 , 5
SAFETY CODE
Either enabled or disabled. When enabled, the setting requires a password
(1234) to be entered in order to start the unit. Factory default is disabled.
SELECT LANGUAGE
Sets the default language for all workouts on this machine.
Language for single use workouts can still be set by the user from the
workout options.
SELECT UNITS
Sets units of measure (US standard or Metric).
Factory default is US standard.
SET MAX WORKOUT TIME
Sets the maximum allowable workout time for each user.
Factory default is 60 minutes.
SET MAX PAUSE TIME
Sets the maximum time that the workout can be paused during a workout.
Factory default is 120 seconds.

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SET COOL DOWN TIME
Sets the amount of time that a cool down period will occur at the end of
every workout. Factory default is 5 minutes. Settable in 1 minute
increments.
SET METRICS DEFAULT
Sets a metric that may be of specific importance to the specific facility or
fitness trainer. The selected metric will scroll across the screen at regular
intervals during the workout.
Factory default is "NONE".
SET SPEED LIMIT
Sets the maximum speed the user can set the unit to.
Factory default is 12 MPH.
SET INCLINE LIMIT
Sets the maximum value the user can set the unit to.
Factory default is 15%.
HIDDEN PROGRAMS
Either enabled or disabled, the setting allows the unit to access specialized
fitness tests designed for police, fire fighters and the military.
Factory default is disabled.
REMOTE SPEED CONTROL
Not currently used or supported in software.
AUTOSTOP CONFIGURE
Sets the Auto Stop setting to On or Off. Factory default is “ON”
SET CUSTOM PROGRAM 1
Intended for a custom program to be programmed if the tread is used in a
residential setting.
SET CUSTOM PROGRAM 2
Intended for a custom program to be programmed if the tread is used in a
residential setting.
Information Display (65)
Information Display Access: press STOP/PAUSE/REST > 6,5
ITEM
DESCRIPTION
ODOMETER
Displays the total number of accumulated miles on the unit.
This value is stored in the upper PCA in the console so if the
PCA is replaced the accumulated miles would start again from "0".
HOUR METER
Displays the total number of hours that the unit took to accumulate unit miles.
This value is stored in the upper PCA in the console so if that PCA is replaced the
hours of use would start again from "0".
BELT RATING
Displays a belt rating from 10 (best) to 0 (worst). Resettable to 10 by holding
QuickStart.
U-BOOT SW
Displays the current version of boot-up software for the upper PCA (console).
U-BASE SW
Displays the current version of software loaded in the upper PCA (console).
This is the unit specific console software.
LOWER SW
Displays the current version of software loaded in the Machine Controller.

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METRICS BOARD
SW
Displays the current version of software loaded in the metrics board.
SER. NUMBER
The base serial number can be set here using the WinCSAFE computer software.
The factory default is NONE.
USAGE LOG
Displays the type of workout programs the users are accessing most frequently.
ERROR LOG
Displays a running log of the last 30 errors encountered on the unit.
TREADMILL
MAINTENANCE
Used to monitor and reset the 1000 mile belt cleaning maintenance reminder.
Mileage counter starts at 1000 miles and decreases to 0 miles which triggers a
blue pulsing ASL light indicating it’s time for belt cleaning maintenance.
The maintenance counter and ASL light is reset as follows:
P10/P30 console
1. Select Treadmill Maintenance.
2. Press and hold QUICKSTART until 1000 Miles is displayed. The ASL light is also
reset.
3. Exit the menu by pressing BACK or PAUSE/RESET.
P80/P82 consoles:
1. Access the service diagnostics (5,1,7,6,5,7,6,1).
2. Select Maintenance page.
3. Select Next Maintenance Due page > Reset.
On P82/P80 consoles, the belt cleaning reminder ASL function can be switched ON
or OFF, select Maintenance Reminder > ON/OFF.

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Theory of Operation
Included topics:
Consoles
Console To Base Communication
Treadmill Base Operation
Consoles
Basic operation of a console
The purpose of this section is to describe the operation and maintenance of the treadmill base,
however it would be difficult to explain the base operation without referring to the console controls.
This section will explain basic functions that apply to all models of consoles. For specific details
about a particular model of console (P10, P30, P80), refer to the applicable console manual.
The Controls
All consoles provide user input (keypad functions), user display (LED display / user feedback),
automated control (heart rate program, interval program) and service software routines (tests,
settings, and information).
The keypad functions can vary between different console models, however the basic functions that
all consoles have are QuickStart, Incline (up or down) and Speed (up or down).
The Display
The display features can vary between different console models, however the information conveyed
by those displays are very similar.
Service software routines are handled exactly the same for all console models. Entering into
Hardware Validation tests, Club Parameter settings, or Information Display is also the same and is
called Standardized Service Access Codes.
The service software and standard access codes are described in detail in Standardized Service
Access Codes of this manual.

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Optional TRM800.v2 Base Consoles
Figure 6: Commercial Treadmill Consoles
P10
P30
P80
Console to Base Communication
The processor in the console provides user input, user display and automated control to the
system. The processor in the lower electronics module performs the actual machine function.
The two processors communicate via a serial data stream. When the user requests a machine
function to take place via the keypad, the console processor communicates the request to the
processor in the lower electronics module.
Once the lower processor receives the request the lower control module performs the machine task
associated with the request. The console processor continues to monitor keypad entry and provide
display feedback. The lower processor also provides status back to the console processor (via the
serial data stream) to report if everything occurred properly, or if an error code needs to be written
to the error log.