Sanyo AHX0752, AHX0952, AHX1252, DHX3652, DHX4852, KHX0752, KHX0952, KHX1252, KHX1852, KHX2452, THX1252, THX1852, THX2452, UHX0752, UHX1252, UHX1852, UHX2452, UHX3652, XHX1252, XHX1852, XHX2452, XHX3652 - page 84

3-22

Trouble Diagnosis

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2

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4

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7

8

4. Blinking (Inspection) Display on the Remote Controller

Currently the blinking inspection display can be displayed only on the wired remote

controller and system remote controller.

Blinking inspection display (1) (Automatic backup)

Alarm code (Blinking inspection display)

Alarm meaning Automatic backup is in progress. A/C units can be operated.

Status: The compressor at one of the outdoor units where the outdoor unit fan is running

should be operating.

* Blinking inspection display also occurs when seizing of the compressor magnet SW is

detected. Because this may also be the case, refer to “Blinking inspection display (2)

(compressor magnet SW seizing detection).”

Alarm conditions When alarm P16, P22, P26, P29, Hx1, Hx2, or H31 has occurred, correcting the control device

(remote controller, etc.) input engages this mode.

Probable cause Because alarm P16, P22, P26, P29, Hx1, Hx2, or H31 has occurred, check the alarm history

then refer to the corresponding items.

Correction Follow the instructions in the corresponding items to correct the trouble.

Recovery After repairing the malfunctioning locations, reset the power for the system (all outdoor units).

Caution: Automatic backup mode will not be canceled until the power is reset.

Notes Automatic backup mode is not engaged in cases of alarms other than those listed above.

Reasons: There is no need for automatic backup if recovery is possible by correcting the

remote controller input.

With alarms for which automatic recovery is possible (such as sensor alarms), the

presence of electrical noise may result in a new alarm. However, it is believed that

this occurs for a comparatively short time only. In these cases, a mode (automatic

backup mode) that limits operation may be engaged.

Control is not possible when a communications system alarm has occurred.

Automatic backup mode is not engaged in order to avoid causing secondary

damage.

CAUTION

Contents

Main TEST RUN SERVICE MANUAL Page ii Check of Density Limit NOTE Contents Page 1-2 1. Test Run 1. Preparing for Test Run 1-3 *1 CASE 3B CASE 3A 1. Test Run 2. Test Run Procedure Items to Check Before the Test Run Page 1-5 2. Setting of Unit Control PCB 10 20 Unit No. setting No. of outdoor units System address No. 1-6 1. Auto Address Setting Basic wiring diagram: Example (1) (Unit No. 2) (Unit No. 1) 1-10 1-7 1-1 1-2 2-1 2-2 2-9 1-3 1-13 Basic wiring diagram: Example (2) 1-8 Page 1-10 Automatic Address Setting* from the Remote Controller 1-11 Display during automatic address setting 1-12 4. Remote Controller Test Run Settings Request concerning recording the indoor/outdoor unit combination Nos. Checking the indoor unit addresses <If 1 indoor unit is connected to 1 remote controller> <If multiple indoor units are connected to 1 remote controller (group control)> Page 1-14 6. Meaning of Alarm Messages 6. Meaning of Alarm Messages Table of Self-Diagnostics Functions and Description of Alarm Displays 1-15 6. Meaning of Alarm Messages P ossible cause of malfunction Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page 2-17 Page 2-19 5. Group Control Using 2 Remote Controllers 6. Remote Controller Setting Mode 7. Indoor Unit Setting Mode 8. To Display the Sensor Temperature: Page 1,3,43,4 2 Page 1,2,3,4 4 2,3,4 Page Page 3,51 2,4 Page Page Page Page Page 2-32 List of Simple Setting Items Page 2-34 List of Detailed Setting Items Setting data 2-35 Setting data DescriptionNo. Item Item code 2-36 Page Page Page Page Page Page Page 3-2 1. Contents of Remote Controller Switch Alarm Display Possible cause of malfunction 3-3 1. Contents of Remote Controller Switch Alarm Display Possible cause of malfunction Page 3-5 W-2WAY ECO-i Trouble Diagnosis 3-6 S004 S005 CN001 3-7 3-8 3-9 3-10 3-11 3-12 3-13 3-14 3-15 3-16 HIC - HIC + HIC PCB 3-17 settings will also correct alarm L06. Refer to the description of alarm L05. 3-18 3-19 Page 3-21 (-) (+) Page 3-23 4. Blinking (Inspection) Display on the Remote Controller Blinking inspection display (2) (compressor magnet SW seizing detection) Page Page 1. Outdoor Unit Control PCB 4-2 1. Outdoor Unit Control PCB CR-CHDX14053 4-3 1. Outdoor Unit Control PCB 2. Functions (for CR-CHDX14053) 4-4 1. Outdoor Unit Control PCB 4-5 1. Outdoor Unit Control PCB 4-6 1. Indoor Unit Control PCB Switches and Functions Indoor unit control PCB 4-7 1. For AC Fan Motor (CR-UXRP71B-B) 2. For DC Fan Motor (CR-SXRP56B-B) Page Page Page 4-11 6. Explanation of Functions (CR-KXRP56AN, CR-KXRP80AN, POW-KRP50A) Page Page Page Page 5-4 Alarm code Alarm meaning The outdoor unit maintenance remote controller can be used to check the alarm display. (Refer to Checking the LED 1 and 2 Alarm Display on the Outdoor Unit Control PCB.) Page Page Page 6-4 and correspond to Fig. 6-3 on the next page. Display (functions) The item codes can be changed with the and buttons. Page Concerning the 7-segment 4-digit display of remote controller timer time Display of unit Nos. 1 20 Display of unit Nos. 21 40 DN Description Remarks