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IV-14
SM831148
4. Service procedures
Check Pin
Short-circuit the cooling check pin (or heating check pin) on the outdoor unit control PCB to perform the control
described below.
1. Thermistor checks
The checks listed below are performed for 1 second each, in order from the top down. The results are displayed
by LED 1 and 2.
Discharge temp. (TD)
Outdoor air temp. ( TO)
Heat exchanger temp. (C1)
Heat exchanger temp. (C2)
Intake temp. (TS)
Thermistor
Check results
Normal
Abnormal
LED 1 and 2 OFF
LED 1 lit
LED 1 lit
LED 1 lit
LED 2 lit
2. 4-way valve turns ON for 1 second.
3. Forced cooling (or heating) operation
4-4. Table of Thermistor Characteristics
(1) Outdoor Air Temp. (TO), Intake Temp. (TS), Heat
Exchanger Temp. (C1) Sensor, Heat Exchanger
Temp. (C2) Sensor
(2) Discharge Temp. (TD) Sensors
Temperature (˚F)
Resistance (k
Ω
)
Temperature (
°
F)
Resistance (k
Ω
)
Summary of Contents for 000 BTU Ductless Single Zone Mini-Split Wall-Mounted Heat Pump
Page 2: ......
Page 77: ...1 2 3 4 5 6 I 73 SM831148 1 Specifications 1 4 Dimensional Data B Outdoor Unit CH4272R C4272R ...
Page 118: ......
Page 128: ...1 2 3 4 5 6 III 10 SM831148 3 Electrical data Wall Mounted Type KH2672R ...
Page 129: ...III 11 SM831148 3 Electrical data 1 2 3 4 5 6 Wall Mounted Type KH2672R Schematic Diagram ...
Page 133: ...III 15 SM831148 3 Electrical data 1 2 3 4 5 6 Wall Mounted Type KHH2672R Schematic Diagram ...
Page 135: ...III 17 SM831148 3 Electrical data 1 2 3 4 5 6 3 2 Outdoor Units CH2672R Schematic Diagram ...
Page 137: ...III 19 SM831148 3 Electrical data 1 2 3 4 5 6 3 2 Outdoor Units C2672R Schematic Diagram ...
Page 143: ...III 25 SM831148 3 Electrical data 1 2 3 4 5 6 3 2 Outdoor Units CH4272R Schematic Diagram ...
Page 145: ...III 27 SM831148 3 Electrical data 1 2 3 4 5 6 3 2 Outdoor Units C4272R Schematic Diagram ...
Page 146: ......