Sanyo STK-RCS-7TWSUA User Manual

TECHNICAL & SERVICE MANUAL

STK-RCS-7TWSUA

WIRED REMOTE CONTROLLER

Model No.

STK-RCS-7TWSUA

Product Code No.

1 852 353 85

FILE NO.

Destination: North America

REFERENCE NO. SM700799

Important! Please Read Before Starting

This air conditioning system meets strict safety and operating standards. As the installer or service person, it is an important part of your job to install or service the system so it operates safely and efficiently.

For safe installation and trouble-free operation, you must:

Carefully read this instruction booklet before beginning. Follow each installation or repair step exactly as shown. Observe all local, state, and national electrical codes. Pay close attention to all warning and caution notices given in this manual.

This symbol refers to a hazard or

WARNING

CAUTION

If Necessary, Get Help

These instructions are all you need for most installation sites and maintenance conditions. If you require help for a special problem, contact our sales/service outlet or your certified dealer for additional instructions.

In Case of Improper Installation

The manufacturer shall in no way be responsible for improper installation or maintenance service, including failure to follow the instructions in this document.

SPECIAL PRECAUTIONS

unsafe practice which can result in severe personal injury or death.

This symbol refers to a hazard or unsafe practice which can result in personal injury or product or property damage.

When Transporting

Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and bend your knees when lifting to reduce strain on your back. Sharp edges or thin aluminum fins on the air conditioner can cut your fingers.

When Installing

In a Ceiling or Wall

Make sure the ceiling/wall is strong enough to hold the unit’s weight. It may be necessary to construct a strong wood or metal frame to provide added support.

In a Room

Properly insulate any tubing run inside a room to prevent "sweating" that can cause dripping and water damage to walls and floors.

In Moist or Uneven Locations

Use a raised concrete pad or concrete blocks to provide a solid, level foundation for the outdoor unit. This prevents water damage and abnormal vibration.

In an Area with High Winds

Securely anchor the outdoor unit down with bolts and a metal frame. Provide a suitable air baffle.

In a Snowy Area (for Heat Pump-type Systems)

Install the outdoor unit on a raised platform that is higher than drifting snow. Provide snow vents.

When Connecting Refrigerant Tubing

•

Use the flare method for connecting tubing.

•

Apply refrigerant lubricant to the matching surfaces of the flare and union tubes before connecting them, then tighten the nut with a torque wrench for a leak-free connection.

•

Check carefully for leaks before starting the test run.

When Servicing

WARNING

•

Do not supply power to the unit until all wiring and tubing are completed or reconnected and checked.

•

Highly dangerous electrical voltages are used in this system. Carefully refer to the wiring diagram and these instructions when wiring. Improper connections and inadequate grounding can cause accidental injury or death.

•

Ground the unit following local electrical codes.

•

Connect all wiring tightly. Loose wiring may cause overheating at connection points and a possible fire hazard.

When Wiring

ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR DEATH. ONLY A QUALIFIED, EXPERIENCED ELECTRICIAN SHOULD ATTEMPT TO WIRE THIS SYSTEM.

•

Turn the power off at the main power box (mains) before opening the unit to check or repair electrical parts and wiring.

•

Keep your fingers and clothing away from any moving parts.

•

Clean up the site after you finish, remembering to check that no metal scraps or bits of wiring have been left inside the unit being serviced.

Others

CAUTION

Ventilate any enclosed areas when installing or testing the

•

refrigeration system. Escaped refrigerant gas, on contact with fire or heat, can produce dangerously toxic gas. Confirm upon completing installation that no refrigerant gas

•

is leaking. If escaped gas comes in contact with a stove, gas water heater, electric room heater or other heat source, it can produce dangerously toxic gas.

Table of Contents

Page

1. SPECIFICATIONS

2. APPLICABLE INDOOR UNITS

3. FUNCTIONS

4. SELF-DIAGNOSTICS

4-1. Self-Diagnostics Procedure 4-2. Self-Diagnostics Table (Ceiling Cassette Type) 4-3. Self-Diagnostics Table (Wall Mounted Type)

APPENDIX A INSTRUCTION MANUAL

APPENDIX B INSTALLATION INSTRUCTIONS  (STK-RCS-7TWSUA)

APPENDIX C INSTALLATION INSTRUCTIONS  (Installing the Connection Kit for Wall-Mounted Models)

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1. SPECIFICATIONS

Item

Description Signal Transmission Method Dedicated Remote Controller Cable Power Source Display Panel Type

Temperature

Display Items

Airflow Direction Time

Temperature Sensor Functions Operation Section

DC5V supplied from Indoor Unit Liquid Crystal Set Temperature Indication (68 ºF to 86 ºF) Six Directions Indication AM and PM 12-Hour Indication (Minute Indication Unit: 1 minute) Displayed when indoor unit sensor is in use AUTO, HEAT, DRY and FAN Operation Push Switch Detection using the Sensor in the Remote Controller or

Room Temperature Detection

Indoor Unit Temperature Sensor (The detection result is transmitted to the indoor unit every 5 minutes)

NOTE

1. When the indoor unit is modified from one for wireless remote controller to that for  wired remote controller, some of the functions becomes unavailable.  Therefore, before such modification, make sure to receive an approval of the client.  Also, the self-diagnostics procedure is changed.  • Unavailable Functions : Refer to "3. FUNCTIONS".  • Self-Diagnostics Procedure : Refer to "4. SELF-DIAGNOSTICS".

2. The mode change or SINGLE/MULTI change-over operation is performed using the slide switch  located inside the rear of the remote controller.  Refer to "APPENDIX B : INSTALLATION INSTRUCTIONS" for details.

NOTE

2 2

70.0 16.5

120.0

2. APPLICABLE INDOOR UNITS

Type Indoor Unit Model No.

Ceiling Cassette Type

Wall Mounted Type

XHS1271, XHS1872, XS1271, XS1872

KHS0971, KHS1271, KHS1872, KHS2472

KS0971, KS1271, KS1872, KS2472

KMHS0772, KMHS0972, KMHS1272, KMHS1872, KMHS2472

KMS0772, KMS0972, KMS1272, KMS1872, KMS2472

3. FUNCTIONS

When the unit is modified from one for wireless remote controller to that for wired remote controller, the following functions become unavailable.

(1) Ceiling Cassette Type

 • Wireless Remote Controller  • High Power Operation

(2) Wall Mounted Type

 • Wireless Remote Controller  • High Power Operation  • Quiet Operation  • ION Operation

4. SELF-DIAGNOSTICS

PROCEDURE

After turning on power to the air conditioner, use the remote controller and follow the steps below to execute selfdiagnostics.

Step 1: Press and hold the remote controller NIGHT SET

BACK (NSB) button and 1 HR TIMER button. Then, press and hold the ACL (reset) button with a pointed object such as the tip of a pen. After 5 seconds, release ACL button first, then release NIGHT SET BACK (NSB) and 1 HR TIMER buttons, "oP-1" (test run) appears, blinking in the remote controller clock display area.

Step 2: Next, press the 1 HR TIMER button once to change

the display from "oP-1" to "oP-3" (self-diagnostics). (The display continues to blink.)

Step 3: Finally press the ON/OFF button to engage self-

diagnostics mode.

•  The self-diagnostics function utilizes the 3 indicator lamps on the main unit, in combinations of ON lamps, blinking lamps, and OFF lamps, to report the existence of sensor trouble or a protective operation. (The lamps blink or remain ON for 5 seconds, then turn OFF for 2 seconds.) Self-diagnostics is completed when the buzzer sounds 3 short beeps.

•  A maximum of 3 self-diagnostics reports are displayed, for 5 seconds each, beginning with the most recent report. Following this display the lamps turn OFF. In order to view the self-diagnostics results again, press the ON/OFF button again.

•  The 3 lamps remain OFF if no trouble has occurred.

<IMPORTANT> After self-diagnostics is completed, be sure

to press the ACL (reset) button to return to normal mode. The air conditioner will not operate if this is not done.

ON/OFF operation button

1 HR.TIMER button

NIGHT SETBACK button

ACL (Reset) button

< Clock display >

Test run mode

Self-diagnostics mode

4-1. Self-Diagnostics Procedure

4-2. Self-Diagnostics Table (Ceiling Cassette Type)

Since the indications cover various units, the corresponding parts listed below may not be present in some models.

Indication on indoor unit

....

OFF

Timer HIGH POWER

Code Diagnostics itemsDiagnostics contents

S01

Room temperature sensor failure

Indoor heat exchanger sensor failure

Compressor temperature sensor failure

Outdoor heat exchanger sensor failure

Outdoor air temperature sensor failure

Indoor/outdoor communications failure (serial communications)

Outdoor unit external ROM (OTP data) failure

Peak current cut-off

• HIC circuit failure

• Power Tr (transistor) circuit failure

PAM circuit failure Active circuit failure

Outdoor system communications failure OLR operation Outdoor power supply open phase Outdoor coil freezing

Compressor discharge overheat prevention activated.

Indoor fan operating failure

No-refrigerant protection

DC compressor drive circuit failure

Outdoor fan operating failure

Freeze-prevention operation activated.

4-way valve switching failure Indoor zero-cross failure

Outdoor electrical current detection failure

S02

S04

S05

S06

S07

E01

E02

E03

E04

E05

E06

E07

E08

E09

E10

E11

E12

E13

....

Blinking

....

ON (Illuminated)

OPERATION

(1) Sensor open circuit or short circuit (2) Contact failure at connector or open circuit at terminal crimping location (3) Indoor/outdoor PCboard failure

(1) Sensor open circuit or short circuit (2) Contact failure at connector or open circuit at terminal crimping location (3) Outdoor PCboard failure

Outdoor PCboard failure

(1) Mis-wiring (2) AC power failure (3) Blown fuse (4) Power Relay failure  (5) Indoor or outdoor PCboard failure (6) Outdoor Fan Motor failure (7) Reactor failure (8) High-Pressure Switch failure (9) Overload Relay failure (10) Magnetic Coil failure * See detailed flowchart in this section.

(1) HIC or power Tr failure (2) Outdoor fan does not turn. (3) Instantaneous power outage (4) Service valve not opened. (5) Outdoor fan blocked. (6) Continuous overload operation  (7) Compressor failure (8) Outdoor PCboard failure

(1) External ROM data failure (2) Outdoor PCboard failure

(1) Instantaneous power outage (2) HIC or power transistor failure  (3) Outdoor PCboard failure

(1) Outdoor PCboard failure (2) Outdoor power supply voltage failure

(1) Electric expansion valve failure (2) Capillaries choked (3) Shortage of refrigerant (4) Continuous overload operation (5) Outdoor fan does not rotate (6) Outdoor

PCboard

failure

(1) Fan motor failure (2) Contact failure at connector (3) Indoor PCboard failure

(1) 4-way valve failure (heat pump model only) (2) Outdoor PCboard failure

(1) Service valve not opened. (2) Shortage of refrigerant

(1) Open phase (2) Outdoor PCboard failure

(1) Fan motor failure (2) Contact failure at connector (3) Outdoor PCboard failure

(1) Mis-wiring (2) Blown fuse (3) Power Relay failure (4) Outdoor PCboard failure (5) Compressor failure * See detailed flowchart in this section.

(1) DRAIN PUMP FAILURE (2) FS FAILURE (3) CHOKED DRAIN HOSE

(1) Indoor fan system failure (2) Shortage of refrigerant (3) Low-temperature operation

REMOTE CONTROL receiver

OPERATION lamp

TIMER lamp

OPERATION button

HIGH POWER lamp

INDOOR UNIT

TIMER

LAMP

BLINKING (3 SEC. INTERVAL)

FLOAT SWICTH (FS) IS ACTIVED.

4-3. Self-Diagnostics Table (Wall Mounted Type)

Since the indications cover various units, the corresponding parts listed below may not be present in some models.

REMOTE CONTROL receiver

(1) OPERATION lamp (2) TIMER lamp (3) QUIET lamp ION lamp

OPERATION button

INDOOR UNIT

Indication on indoor unit

....

OFF

Timer Operation

Code Diagnostics items Diagnostics contents

S01

Room temperature sensor failure

Indoor heat exchanger sensor failure

Humidity sensor failure

Compressor temperature sensor failure

Outdoor heat exchanger sensor failure

Outdoor air temperature sensor failure

Indoor/outdoor communications failure (serial communications)

Outdoor unit external ROM (OTP data) failure

Peak current cut-off

• HIC circuit failure

• Power Tr (transistor) circuit failure

PAM circuit failure Active circuit failure

Outdoor system communications failure OLR operation Outdoor power supply open phase Outdoor coil freezing

Compressor discharge overheat prevention activated.

Indoor fan operating failure

No-refrigerant protection

DC compressor drive circuit failure

Outdoor fan operating failure

Freeze-prevention operation activated.

4-way valve switching failure Indoor zero-cross failure

Outdoor electrical current detection failure

S02

S03

S04

S05

S06

S07

E01

E02

E03

E04

E05

E06

E07

E08

E09

E10

E11

E12

E13

....

Blinking

....

ON (Illuminated)

Quiet

(3)(2) (1)

(1) Sensor open circuit or short circuit (2) Contact failure at connector or open circuit at terminal crimping location  (short-circuit detection only for the humidity sensor) (3) Indoor/outdoor PCboard failure

(1) Sensor open circuit or short circuit (2) Contact failure at connector or open circuit at terminal crimping location (3) Outdoor PCboard failure

Outdoor PCboard failure

(1) External ROM data failure (2) Outdoor PCboard failure

(1) Instantaneous power outage (2) HIC or power transistor failure  (3) Outdoor PCboard failure

(1) Outdoor PCboard failure (2) Outdoor power supply voltage failure

(1) Electric expansion valve failure (2) Capillaries choked (3) Shortage of refrigerant (4) Continuous overload operation (5) Outdoor fan does not rotate (6) Outdoor

PCboard

failure

(1) Fan motor failure (2) Contact failure at connector (3) Indoor PCboard failure

(1) 4-way valve failure (heat pump model only) (2) Outdoor PCboard failure

(1) Service valve not opened. (2) Shortage of refrigerant

(1) Open phase (2) Outdoor PCboard failure

(1) Fan motor failure (2) Contact failure at connector (3) Outdoor PCboard failure

(1) Mis-wiring (2) Blown fuse (3) Power Relay failure (4) Outdoor PCboard failure (5) Compressor failure * See detailed flowchart in this section.

(1) Indoor fan system failure (2) Shortage of refrigerant (3) Low-temperature operation

APPENDIX A

STK-RCS-7TWSUA

INSTRUCTION MANUAL

(OI-852-6-4181-139-00-0)

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