Service manual

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T--318
e. The strap should be worn during any service work on
the controller, even when it is placed on the mat.
6.21.2 Controller Troubleshooting
A group of test points (TP) (see Figure 6-26) are
provided on the controller for troubleshooting electrical
circuits (see schematic diagram, section 7). A
description of the test points follows:
NOTE
Use a digital voltmeter to measure AC voltage
between TPs and ground (TP9), except for
TP8.
TP2
This test point enables the user to check if the internal
protector for the compressor motor (IP-CP) or high
pressure switch is open.
TP3
This test point enables the user to check if the water
pressure switch (WP) contact is open or closed.
TP 4
This test point enables the user to check if the internal
protector for the condenser fan motor (IP-CM) is open or
closed.
TP 5
This test point enables the user to check if the internal
protectors for the evaporator fan motors (IP-EM1 or
IP-EM2) are open or closed.
TP 6
This test point enables the user to check if the controller
water tank heater relay (TQ) is open or closed.
TP 7
This test point is not used in this application.
TP 8
This test point is not applicable to the units covered
herein.
TP 9
This test point is the chassis (unit frame) ground
connection.
TP 10
This test point enables the user to check if the heat
termination thermostat (HTT) contact is open or closed.
6.21.3 Controller Programming Procedure
To load new software into the module, the programming
card is inserted into the programming/software port.
CAUTION
The unit must be OFF whenever a program-
ming card is inserted or removed from the
controller programming port.
a. Procedure for loading operational software
1. Turn unit OFF via start-stop switch (ST).
2. Insert software/programming PCMCIA card contain-
ing the following (example) files into the program-
ming/software port (see Figure 6-26):
menuDDMM.ml3 -- This file allows the user to select
a file/program to upload into the controller.
cfYYMMDD.ml3 -- Multi-configuration file.
3. Turn unit ON via start-stop switch (ST).
4. The display module will display the message ruN
COnFG. If a defective card is being used, the display
will blink the message “bAd CArd.” T urn start-stop
switch OFF and remove the card.
5. Press the UP or DOWN arrow key until display
reads, LOAd 54XX for Recip (even numbers).
6. Press the ENTER key on the keypad. The display
will alternate to between PrESS EntR and rEV
XXXX.
7. Press the ENTER key on the keypad.
8. The display will show the message “Pro SoFt”. This
message will last for up to one minute.
9. Press the ENTER key on the keypad.
10.The display module will go blank briefly, then read
“Pro donE” when the software is loaded. If a problem
occurs while loading the software, the display will
blink the message “Pro FAIL” or “bad 12V.” T urn
start-stop switch OFF and remove the card.
11. Turn unit OFF via start-stop switch (ST).
12.Remove the PCMIA card from the programming/-
software port and return the unit to normal operation
by placing the start-stop switch in the ON position.
13.Turn power on and wait 15 second. The status LED
will flash quickly and there will be no display. The
controller is loading the new software into memory.
This takes about 15 seconds.
When complete the controller will reset and power up
normally.
14 Wait for default display -- setpoint on the left and con-
trol temperature on the right.
15.Confirm software is correct using keypad code se-
lect 18 to view Cd18 XXXX.
16.Turn power off. Operational software is loaded.
b. Procedure for loading configuration software:
1. Turn unit OF F using start-stop switch (ST).
2. Insert software/programming PCMCIA card contain-
ing the following (example) files into the program-
ming/software port (see Figure 6-26):
menuDDMM.ml3 -- This file allows the user to select
the file/program to upload into the controller .
cfYYMMDD.ml3 -- Multi-configuration file.
recp54XX.ml3 -- Controller software program for
recip units.
3. Turn unit ON using start-stop switch (ST).
4. The display module will display the message ruN
COnFG. If a defective card is being used, the display
will blink the message “bAd CArd.” T urn start-stop
switch OFF and remove the card.
5. Press the ENTER key on the keypad.