Microtech Iii Control Parameters; Factory Communications Troubleshooting Instructions; Possible Faults - Daikin MD5 Operation Manual

MicroTech III Control Parameters:

The MD5 will be factory configured to work with MicroTech
III Controls and factory tested . The downloaded parameters
have a high probability of being fully correct if the following
parameters are set .
• Parameter 9802 states: "STD MODBUS" .
• Parameter 1001, 1103, 1601, 1604 and 1608 state:
"COMM" .
• Parameter 5302 = address 1, 2 or 3 as required by the
application .
• Parameter 5303 = "192" buad rate (19 .2 K Bytes/second) .
• Parameter 5304 = "8 NONE 2" .
• Parameter 5306 "EFB OK MESSAGES" will count up for
every correct message received and continue to do so .
• Parameter "EFB STATUS" shows "ON-LINE" .
• Parameter 8120 states "NOT SEL" . If "DI4" is seen . This
must be changed to = "NOT SEL" .
• Parameter 1002 states "NOT SEL" . Change to = "NOT
SEL" if needed .
Factory Communications
Troubleshooting Instructions
Reference: Diagnostics on page
OM 1191 • MD5 VFD
74 .

Possible Faults

• Loose wires. Difficult to discover, check mechanical
tightness of all terminal connection points . Other faults
specifically described below may be observed.
• Incorrect connections (including swapped wires) .
• Bad grounding . Check for excessive EFB errors; improve
communications cable installation as required .
• MicroTech III does not properly recognize the difference
between the SAF, RAF and EAF condenser fan or energy
recovery VFDs if the values for both 5307 and 5308
increase for each error transmission attempt .
• MicroTech III communications is not working if
parameters 5306, 5307 or 5308 do not continually
increment their count .
• The Modbus communication port is not working (broken
or controller is OFF) if ALARM 2021 is flashing on the
kepad screen, parameter 5306 is not increasing its count,
or parameter 5309 "EFB STATUS" shows on the keypad
as "IDLE" .
• The Daikin Factory Test Operator will change any Group
99 values to match the installed motor nameplates as
required for Rooftop and Self-Contained units . Maverick
units have specific allowed motor amp values that are
entered into the VFD matching the design specification.
90
a
PPendix
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