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

DIGITAL
DESCRIPTION
DISPLAY
dd Heating/Cooling Mode Conflict
Communication Error Between
E1
Indoor and Outdoor Unit
E2, E4,
Check Temperature Sensor
E5
E6 Check DC Fan Motor
E7 EEPROM Error (Data Storage) Chip or PC board fault.
Communication Error Between
E9
Indoor Unit and Controller
Eb EEV Error
Ed Outdoor Unit Error
EE Condensate Overflow
No Address When Powered
FE
ON For First Time
MDC In Auto System-Check
UU
Mode
LEGEND:
EEPROM — Electronically Erasable Programmable Read-only Memory
EEV — Electronic Expansion Valve
MDC — Multiport Distribution Controller
PC — Process Controller
Replacement Parts —
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. 43.
Table 6 — Troubleshooting
POSSIBLE CAUSES
System is in cooling or fan mode only and heating
signal is received from a unit in 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 wires 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.
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.
Quote the unit type and unit
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.
Check or reconnect signal wire.
Replace EEV.
Replace PC board.
Refer to outdoor unit troubleshooting guide.
Tighten the connection or reconnect at port on
PC board.
Inspect the float.
Adjust the trap slope.
Adjust the length of the drain pipe.
Replace the drain pump.
Run automatic addressing option at outdoor
unit.
Use remote wireless or wired controller to
readdress the 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.
ONE-WAY CASSETTE
AIR CONDITIONER INDOOR UNIT
MODEL
POWER SUPPLY
MINIMUM CIRCUIT AMPACITY
MAX FUSE OR HACR BREAKER
FAN MOTOR
REFRIGERANT
DESIGN
PRESSURE
SERIAL NO.
Fig. 43 — Unit Serial Plate (Example)
21
POSSIBLE SOLUTIONS
40VMI005---A
208/230V-1Ph-60Hz
0.29A
15 A
FLA
0.23 A
20W (1/30HP)
OUTPUT
R410A
HIGH 650 PSIG
LOW 250 PSIG
Carrier Corporation