Lennox MWHA009S4-1L, Installation Instructions Manual

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18
4-WAY
DC- FAN
CN 414
3
PAN
HEATER
CN
19
CN
60
CRANKCASE
HEATER
CN
16
AM
BI
EN
T T
EMP
. SE
NS
OR
DIS
CHAR
GE
TEMP
. SENSO
R
CN 17
.
Y/G
BLUE
BROWN 1
BLACK 3
3 2 L1L2
RED
BLUE L2
1
Y/G
Y/G
CN 3
Y/G
Y/G
COMPRESSOR
Y/G
U V W
BLUE
RED
BLACK
L1 L2
S
White
Red
Blue
CN 6 CN 7 CN 8 CN 2
CN
21
W
V
U
OUTDOOR CONTROL
TP/
T5
Figure 39. 24K - 208/230VAC Outdoor Unit Wiring Diagram
Unit Start-Up
IMPORTANT
Units should be energized 24 hours before unit start­up
to prevent compressor damage as a result of slugging.
1. Inspect all factory- and field-installed wiring for loose
connections.
2. Verify that the manifold gauge set is connected.
3. Add additional refrigerant charge if required before
opening valves and while system is still under a
vacuum.
4. Open the liquid and suction line service valves to
release the refrigerant charge contained in outdoor
unit into the system.
5. Replace the stem caps and tighten to the value listed
in “Table 3. Torque Requirements” on page 7.
6. Check voltage supply at the outdoor unit terminal strip.
The voltage must be within the range listed on the
unit’s nameplate. If not, do not start the equipment
until you have consulted with the power company and
the voltage condition has been corrected.
7. Refer to the included user guide to operate the system
using the provided remote control.
8. Visually check for binding of both indoor and outdoor
fans.
Troubleshooting
Table 10. Indoor Unit Error Codes
Display Error Information
E0 Indoor unit EEPROM parameter error
E1 Indoor / outdoor units communication error
E2 Zero-crossing signal detection error
E3
The indoor fan speed is operating outside of the normal
range
E4
Indoor room temperature sensor T1 is in open circuit or
has short circuited
E5
Evaporator coil temperature sensor T2 is in open circuit or
has short circuited
EC Refrigerant leak detected
F0 Overload current protection
F1
Outdoor ambient temperature sensor T4 open circuit or
short circuit
F2
Condenser coil temperature sensor T3 is in open circuit or
has short circuited
F3
Compressor discharge temperature sensor TP open circuit
or short circuit
F4 Outdoor unit EEPROM parameter error
F5
The outdoor fan speed is operating outside of the normal
range
p0 IPM malfunction or IGBT over-strong current protection
p1 Over voltage or over low voltage protection
p2 High temperature protection of IPM module