Westinghouse WPAPH-090CA4, Service Manual

Page: 106 / 118

WESTINGHOUSE PACKAGE A/C MANUAL R-410A : 220V: 60Hz
105
17.2 Trouble shooting
For 5ton
Item Content Error code
1
Compressor phase sequence error or phase default E0
2
Outdoor coil temp. sensor T3-1 default E1
3
Outdoor coil temp. sensor T3-2 default E2
4
Indoor coil temp. sensor T2-1 default E5
5
Indoor coil temp. sensor T2-2 default E6
6
Indoor temp. sensor T1 error
E9
7
Outdoor ambient temp. sensor T4 error EA
8
Wired controller output error Eb
9
Over current protection P0
10
Comprehensive protection for outdoor fan P3
11
Protection for High/Low Pressure or exhaust temp. P4
1) E0
：
Compressor phase sequence error or phase default
2) E1
：
Outdoor coil temp. sensor T3 default.
Yes
No
Yes
Yes
No
No
Detect if the temp. Sensor is normal.
Cut off power supply, replace the
power wire, inspect again.
Detect if the voltage of 5p wire joint
between A, B and C is normal.
Cut off power supply, exchange
freely two wires between A, B and
C. Power on again, if the main
board display E0.
Detect if the main board voltage
between A, B and C is normal.
Cut off power supply, exchange the
wire from main power supply to main
board. Power on again, retesting.
Replace the main board.
OK.
Replace the main board.
Yes
No
Replace the temp. sensor, detect
it again.