Replacement Parts - Carrier 40VMU Series Installation And Maintenance Instructions Manual

ERROR DESCRIPTION
dd Heating / Cooling Mode Conflict
Communication Error Between
E1
Indoor & Outdoor Unit
E2, E4, E5 Check Temperature Sensor
E6 DC Fan Motor
E7 EEPROM Error (Data Storage)
Communication Error Between
E9
Indoor Unit and Controller
Eb EEV Error
Ed Outdoor Unit Error
EE Condensate Error
No Address When Power ON for first
FE
time
UU MDC Auto System-Check Mode
LEGEND
EEV — Electronic Expansion Valve
EEPROM — Electronically Erasable Programmable Read-only Memory
— Multiport Distribution Controller
MDC
PC — Process Controller

Replacement Parts

Quote the unit model number and unit serial number when
ordering replacement parts or contacting the factory about the
unit. This information can be found on the serial plate attached
to the unit. See Fig. 31.
Table 9 — Troubleshooting
POSSIBLE CAUSES
System is in cooling or fan only mode and
heating signal is received from a unit on the
system.
System is in heating mode and cooling
signal is received from a unit in the system.
Signal wires are short-circuited or
disconnected.
Signal wire close to electromagnetic
source.
PC board fault.
Loose connection at port on PC board.
Sensor is short-circuited.
PC board fault.
Operating beyond limits.
DC motor fault.
PC board fault.
Chip or PC board fault.
Signal wires are short-circuited or
disconnected.
Signal wires close to electromagnetic
source.
PC board fault.
EEV wires are short-circuited or
disconnected.
EEV stop.
PC board fault.
Outdoor unit fault.
Loose connection or disconnected at port
on PC board.
Condensate switch float is stuck.
Trap slope is too steep.
Drain pipe is too long.
Drain pump faulty.
Indoor unit without address.
MDC fault
16
POSSIBLE SOLUTIONS
All units should be in cooling mode for system to
stay in cooling mode.
All units should be in heating mode.
Check or reconnect signal wire.
Distance signal wires from electromagnetic
source.
Replace PC board.
Tighten the connection at port on PC board.
Using multi-meter, measure resistance of the
sensor. If the resistance is < 100 ohms, change
the sensor.
Replace PC board.
Check and correct external static pressure on
the unit.
Replace DC motor.
Replace PC board.
Replace PC board.
Check or reconnect signal wires.
Distance signal wires from electromagnetic
source.
Replace PC board.
Replace EEV wires.
Replace EEV
Replace PC board.
Refer to outdoor unit troubleshooting guide.
Tighten the connection or reconnect at port on
PC board.
Inspect the slope.
Adjust the trap slope.
Adjust the length of drain pipe.
Replace the drain pump.
Run automatic addressing option at the outdoor
Use remote wireless or wired controller to
readdress indoor unit.
Refer to MDC troubleshooting guide.
CONFORMS TO UL STD 1995
CERTIFIED TO CSA STD.
C22. 2 No. 236
ELECTRIC CHARACTERISTICS ARE
ONLY FOR INDOOR UNIT.
3124627
CEILING/FLOOR UNIT
40VMU012---3
MODEL
POWER SUPPLY 208/230V-1Ph-60Hz
MINIMUM CIRCUIT AMPACITY
0.44 A
MAX FUSE OR HACR BREAKER 15 A
FLA 0.35 A
FAN MOTOR
OUTPUT 100W (1/6HP)
REFRIGERANT R410A
HIGH 580 PSIG
DESIGN
PRESSURE
LOW 320 PSIG
SERIAL NO.
1616V00001
Carrier Corporation
Fig. 31 —Unit Serial Plate (Example)
unit.