Replacement Parts - Carrier 40VMW005 Installation And Maintenance Instructions Manual

DIGITAL DISPLAY DESCRIPTION
dd Heating/Cooling Mode Conflict
Communication Error Between Indoor
E1
and Outdoor Unit
E2, E4, E5 Check Temperature Sensor
E6 Check DC Fan Motor
E7 EEPROM Error (Data Storage)
Communication Error Between Indoor
E9
Unit and Controller
Eb EEV Error
Ed Outdoor Unit Error
EE Condensate Overflow
No Address When Powered ON For
FE
First Time
UU MDC In Auto System-Check Mode
LEGEND
EEPROM — Electronically Erasable Programmable Read-only Memory
EEV — Electronic Expansion Valve
MDC — Multiport Distribution Controller
— Process Controller
PC
Replacement Parts —
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. 29.
Table 6 — Troubleshooting
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.
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.
Quote the unit model number
POSSIBLE CAUSES
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 the outdoor unit.
Use remote wireless or wired controller to readdress
the indoor unit.
Refer to MDC troubleshooting guide.
Fig. 29 — Unit Serial Plate (Example)
17
POSSIBLE SOLUTIONS