Sanyo CH2432, CH3632, XHS2432, XHS3632 Fig. 20

4. Service procedures

1

2

3

4

Section

– 60 – SM830076

(4) LED Indication on the Outdoor Unit’s P.C.B. Ass’yIf something goes wrong with the outdoor unit, LED lamps on the outdoor P.C.B. Ass’y lightup to show the cause of the trouble, in addition to the Alarm message on the remotecontroller.

LED 2 on

P.C. board Remote

controller

LED 1 on

P.C. board Possible cause of trouble

Normal

Outdoor unit serial communication signal is abnormal.

Outdoor unit address is duplicated.

Other outdoor units are performing auto address and

detecting refrigerant shortage.

FMo • CM thermal protection is in operation.

Power supply voltage is abnormal.

High voltage SW activates

Negative phase protector activates.

Sensor is abnormal. (Open or short)

Abnormal compressor current value is detected.

Auto address failure

Auto address is in operation.

NOTE v: LED lamps OFF V: LED lamps ON (lights up) *: LED lamps ON (flashes)

vvNo message

vV

E06, E07, L04

v*No message

VvP02

VVP04, P05

V*F04~F09

*vH01, H02

**E15, E16

**

“SETTING”

flashes.

Flash at the same time

* REFRIGERANT SHORTAGE

Note particularly that a shortage of refrigerant is only shown by the outdoor P.C.B. Ass’y

LEDs and the Alarm Message does not appear on the Indoor Remote Controller . The

compressor keeps running even when the refrigerant is less, so when you find the LED

indication on the outdoor P.C.B. Ass’y, stop the air conditioner immediately to avoid the

compressor damage.

Fig. 20

1125_C_I

LED 1 (D11)

LED 2 (D12)

CAUTION

Flash alternately

Contents

Main SERVICE MANUAL Please Read Before Starting If Necessary, Get Help 2 In Case of Improper Installation Important CAUTION When Installing In an area with High Winds In a Snowy Area (for Heat Pump-type Sys-tems) WHO SHOULD USE THIS MANUAL TABLE OF CONTENTS Page Introduction: WHAT IS IN THIS MANUAL diagnostic Read Me First! HOW TO USE THIS MANUAL 1. SPECIFICATIONS 7 8 Page Page Page Page Page Page Page Page Page Page (A) Indoor Unit: XHS2432 Dimension : inch Remote controller (Accessory) (A) Indoor Unit: XHS3632 (B) Outdoor Unit: CH2432 (B) Outdoor Unit: CH3632 23 1-5 Refrigerant Flow Diagram Outdoor Unit: CH2432 Indoor Unit: XHS2432 1-6 Operating Range 1-5 Refrigerant Flow Diagram Outdoor Unit: CH3632 Indoor Unit: XHS3632 1-6 Operating Range 2. PROCESSES AND FUNCTIONS Fig. 1 2-1 Room Temperature Control 27 Fig. 2 2-2 Cold Draft Prevention (Heating Cycle) 29 Fig. 4 Fig. 5 2-3 Automatic Fan Speed (Indoor Unit) 2-4 Outdoor Fan Speed Control 2-5 Freeze Prevention (Cooling) Fig. 9 2-6 Condensing Temperature Control (Cooling) 33 Fig. 10 2-7 Overload Protection (Heating) This function prevents the air conditioner from overloading. 2-8 Discharge Temperature Control (Cooling and Heating) This function prevents the compressor motor from burnout by overheating. Fig. 11 Chart Summary and Explanations 2-9 Auto. Mode for Automatic Heating/Cooling Switching Page 37 2-10 Defrosting Control, Outdoor Heat Exchanger Coil (Heating) Fig. 14 Fig. 13 Time Chart for Defrosting 2-11 4-Way Valve, Solenoid Control Fig. 15 39 (B) AUTO Control Mode Fig. 17 2-12 Automatic Restart after Power Interruption 2-13 Electronic Expansion Valve 2-14 Compressor Discharge Gas Temperature (B) Heating (Except During Defrosting) Model 41 2-15 Compressor Current Detection Circuit Fig. 18 2-16 Electronic Expansion Valve Control Page Page Page 3-1 Indoor Unit Electric Wiring Diagram 1XHS2432, XHS3632 1 MOV W 854-2-5268-772-00-0 (XHS) Schematic Diagram FMI Symbols Description 1CH2432 TH7 Electric Wiring Diagram TH8 FMO W 854-2-5268-582-00-2 (CH2432) 1CH2432 Schematic Diagram CM FMO 2CH3632 TH7 Electric Wiring Diagram TH8 FMO2 W 854-2-5268-621-00-0 (CH3632) FMO1 Schematic Diagram CM FMO2 FMO1 Page 4. SERVICE PROCEDURES 4-1 Troubleshooting 33 33 3. Check power supply Page Page Page Page Fig. 20 CAUTION Page Page Page Page Page Page Page 14) Symptom: LCD on the remote controller displays CHECK E15. 15) Symptom: LCD on the remote controller displays CHECK E16. 16) Symptom: LCD on the remote controller displays CHECK L13. 17) Check P9 is displayed on the remote control unit. Page (6) Procedures When a Specific Component Does Not Work 1) Indoor fan does not operate. 2) Flaps in indoor units air outlet does not operate, when you press SWEEP button. 3) Compressor motor does not operate. 4) Outdoor fan does not operate. Page Page Page Page Page Page Page Page * Page Page Page Page Page (1) Measurement of Insulation Resistance 4-2 Checking the Electrical Components (2) Checking the Protective Devices (3) Checking the Electrical Parts Page Page Indoor Unit XHS2432 (4) Sensor and Solenoid Layout Diagram Outdoor Unit CH2432 TH2 (E1), (RED) TH3 (E2), (BLK) Electronic expansion valve Indoor Unit XHS3632 (4) Sensor and Solenoid Layout Diagram TH3 (E2), (BLK) Outdoor Unit CH3632 TH2 (E1), (RED) Electronic expansion valve (5) Thermistor Characteristic Curve (1) Room temp. sensor : TH1 (KTEC-35) Temperature (F) 6 5 4 Page Refrigerant circuit address (black) 2 ON 1 (0 when shipped from factory) Both 10s and 20s 10 position 20 position ON side : S2 Page Page (11) Test Run Page 101 (11)-3. Test Run Procedure 1) One of CN4 of all linked outdoor units shold be short. 2) NOTE (12) P.C.B. and Parts Location P.C.B. (CR-THS2432) FOR INDOOR UNITS 103 (12) P.C.B. and Parts Location P.C.B. (CR-CH2432) FOR OUTDOOR UNITS CR-CH2432 (13) Checking procedure for each P.C.B. (14) Check Pins