Troubleshooting Matrix - Goodman MBVC 1 Series Installation Instructions Manual

TROUBLESHOOTING MATRIX

Symptoms of Abnormal
Operation
No outdoor unit operations
No Air Handler operation
No Air Handler operation
No Air Handler operation
No Air Handler operation
Operation different than expected
or no operation
No Air Handler operation
No Air Handler operation
No Air Handler operation
Air Handler operates at reduced
performance
Airfow delivered is less than
expected
Diagnostic
/ Status Fault Description
LED Codes
Communication error

with outdoor unit
Open fuse

Auxiliary switch
(condensate switch)

open or open fuse
Data not yet on network

Invalid memory card data

Invalid memory card data

Circulator blower motor
not running with demand

present
Integrated control
module has lost

communications with
circulator blower motor
Circulator blower motor
horse power in shared
data set does not match

circulator blower motor
horse power
Circulator blower motor
is operating in a power,

temperature, or speed
limiting condition
Possible Causes
Improper low voltage wiring
between the indoor and
outdoor unit
Outdoor control board lost
power duirng operation
Short in low voltage wiring
High water level in the
evaporation coil or short in
low voltage wiring
No network data
Air Handler blower does not
contain an appropriate shared
data set
Shared data set on memory
card has been rejected by
integrated control module
Loose or disconnected wiring
connection at circulator
motor power leads
Open circuit in inductor or
loose wiring connection at
inductor (3/4 Hp and 1 Hp
models only)
Failed circulator blower motor
Loose wiring connection at
circulator motor control leads
Failed circulator blower motor
Failed integrated control
module
Incorrect circulator blower
motor in Air Handler
Incorrect shared data set in
integrated control module
Blocked flters
Restrictive or undersized
ductwork
High ambient temperatures
13
Corrective Actions
Locate and correct improper low
voltage wiring issue
Identify reason outdoor control
board lost power during operation
Locate and correct short in low
voltage wiring
Replace fuse with 3-amp automotive
type
Check evaporator drain pan, trap,
piping
Replace fuse with 3-amp automotive
type
Populate shared data set using
memory card
Populate correct shared data using
memory card
Verify shared data set is correct for
the specifc model. Re-populate data
using correct memory card if required
Tighten or correct wiring connection
Verify continuous circuit through
inductor.
Replace if open or short circuit
Check circulator blower motor
Tighten or correct wiring connection
Check circulator blower motor,
replace if necessary
Check integrated control module,
replace if necessary
Verify circulator blower if motor
horse power is the same specifed for
the specifc Air Handler model,
replace if necessary
Verify shared data set is correct for
the specifc model, re-populate data
using correct memory card if required
Check filters for blockage, clean
flters or remove obstruction
Check ductwork for blockage,
remove obstruction and verify all
registers are fully open
Verify ductwork is appropriately sized
for system and resize/replace ass
needed