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Toshiba
Air Conditioner
MMY-MAP0804HT5P
Service Manual
Page 23 (Indoor Unit)
Toshiba MMY-MAP0804HT5P - Indoor Unit; 4-Way Cassette Type
298 pages
Manual
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1-2. Indoor
Unit
Models: MMU-AP009
4HP*
, AP012
4HP*
, AP015
4HP*
, AP018
4HP*
, AP024
4HP*
, AP027
4HP*
, AP030
4HP*
,
AP036
4HP*
, AP048
4HP*
, and AP056
4HP*
– 22 –
1-2-
1
.
4-way Cassette Type
22
24
Table of Contents
Main Page
Table of Contents
2
Safety Caution
6
New Refrigerant (R410A)
19
Wiring Diagrams
21
Outdoor Unit
21
Indoor Unit
23
4-Way Cassette Type
23
Compact 4-Way Cassette Type
24
1-Way Cassette Type (Compact Type)
25
1-Way Cassette Type SH Series
26
2-Way Cassette Type 2 Series
27
Concealed Duct Standard Type
28
Concealed Duct Standard Type 6 Series
29
Concealed Duct High Static Pressure Type
30
Slim Duct Type
32
Slim Duct Type (AP024, AP027)
33
Ceiling Type
34
High Wall Type 4MH Series
35
High Wall Type 3 Series
36
Floor Standing Cabinet Type
37
Floor Standing Concealed Type
38
Floor Standing Type
39
Air to Air Heat Exchanger with DX Coil Unit
40
Fresh Air Intake Indoor Unit
44
Parts Rating
46
Outdoor Unit (60Hz Model: MMY-MAP *** 4 * T5 * P * )
46
Outdoor Inverter (60Hz Model: MMY-MAP *** 4HT5P * P)
47
Parts Layout in Outdoor Unit
48
Parts Layout in Inverter Assembly
50
Outdoor (Inverter) Print Circuit Board
52
Interface P.C. Board (MCC-1606)
52
Inverter P.C. Board for Compressor (MCC-1596) A3-IPDU
53
Inverter P.C. Board for Fan (MCC-1610)
54
Refrigerant Piping Systematic Drawing
55
Combined Refrigerant Piping System Schematic Diagrams
59
Normal Operation (COOL Mode / DEFROST Mode)
59
High Outside Air Temperature (Roughly 20°C or Above)
59
Normal Operation (COOL Mode) - Low Outside Air Temperature (Roughly below 20°C)
60
Normal Operation (HEAT Mode)
61
Emergency Operation (Cooling Operation under Header Outdoor Unit Backup Scenario)
62
Emergency Operation (Heating Operation under Header Outdoor Unit Backup Scenario)
63
Refrigerant Recovery from Failed Outdoor Unit (Pump-Down Operation under Follower Outdoor Unit Backup Scenario)
64
Control Outline
65
Applied Control and Functions (Including Circuit Configuration)
80
Indoor Controller Block Diagram
80
When Wired (Simple) Remote Controller Connected
80
When Wireless Remote Controller Kit Connected
83
When both Main (Sub) Remote Controller and Wireless Remote Controller
86
Kit Connected
86
Indoor Printed Circuit Board
89
Optional Connector Specifications of Indoor P.C. Board
92
Test Operation of Indoor Unit
93
Method to Set Indoor Unit Function DN Code
94
Applied Control of Indoor Unit
98
Applied Control for Outdoor Unit
101
Outdoor Fan High Static Pressure Shift
101
Priority Operation Mode Setting
102
Applied Control of Outdoor Unit
104
Power Peak-Cut Control (Standard)
105
Power Peak-Cut Control (Extended)
106
Snowfall Fan Control
107
External Master ON/OFF Control
107
Night Operation (Sound Reduction) Control
108
Operation Mode Selection Control
109
Error/Operation Output
110
Compressor Operation Output
111
Operating Rate Output
112
Test Operation
113
Procedure and Summary of Test Operation
113
Check Items before Test Operation (before Powering-On)
114
Check at Main Power-On
118
Address Setup
119
Precautions
119
Address Setup and Check Procedure
119
Address Setup Procedure
120
Check after Address Setup When Central Control System Is Connected
133
Troubleshooting in Test Operation
134
A Check Code Is Displayed on the Remote Controller
134
Operation from the Indoor Remote Controller Is Not Accepted, and a Check Code Is Displayed on the 7-Segment Display of the Interface PC Board of the Header Unit
135
There Is no Display of a Check Code on the 7-Segment Display on the Interface
135
PC Board of the Header Unit, Although There Is Indoor Unit that Is Not Accepting Operation from the Indoor Remote Controller
135
In Checking the Number of Connected Outdoor Units and Connected Indoor Units
136
Outdoor/Indoor Units that Do Not Operate in a Test Operation.)
136
Test Operation Check
138
Fan Check
138
Single Cooling/Single Heating Test Operation Check
139
Service Support Function
143
Check Function for Connecting of Refrigerant and Control Lines
143
Function to Start/Stop (ON/OFF) Indoor Unit from Outdoor Unit
145
Error Clearing Function
150
Remote Controller Distinction Function
152
Pulse Motor Valve (PMV) Forced Open/Close Function in Indoor Unit
153
Pulse Motor Valve (PMV) Forced Open Fully/Close Fully Function in Outdoor Unit
153
Solenoid Valve Forced Open/Close Function in Outdoor Unit
154
Fan Operation Check in Outdoor Unit
155
Abnormal Outdoor Unit Discrimination Method by Fan Operating Function
156
Manual Adjustment Function of Outside Temperature (TO) Sensor
157
Monitor Function of Remote Controller Switch
158
Troubleshooting
161
Overview
161
Troubleshooting Method
162
Troubleshooting Based on Information Displayed on Remote Controller
168
Check Codes Displayed on Remote Controller and SMMS-I Outdoor Unit (7-Segment Display on I/F Board) and Locations to be Checked
173
Diagnosis Procedure for each Check Code
189
7-Segment Display Function
220
Oil Level Judgment Display
226
Leakage/Clogging of Refrigerating Cycle Circuit
227
Sensor Characteristics
231
Pressure Sensor Output Check
234
Backup Operation
236
(Emergency Operation)
236
Note for Backup Operation
236
Compressor Backup Operation Setting
237
Outdoor Unit Backup Operation Setting
238
Follower Outdoor Unit Backup Operation Setting (Failure of Follower Outdoor Unit)
238
Header Outdoor Unit Backup Operation Setting (Failure of Header Outdoor Unit)
240
Cooling-Season Outdoor Unit Backup Operation Setting
242
Outdoor Unit Refrigerant Recovery Method
243
Refrigerant Recovery from Failed Outdoor Unit (Pump-Down)
243
Note for Refrigerant Recovery Operation
243
Refrigerant Recovery Procedure a (Case of no Outdoor Unit Backup Operation Setting)
243
Refrigerant Recovery Procedure B (Case of Outdoor Unit Backup Operation Setting)
247
How to Operate System While Failed Outdoor Unit Being Repaired
248
Work Procedure after Repair
249
Replacing Compressors
250
Compressor Replacement Procedure (Outline)
250
Replacement of Compressors
251
Check Procedure to Search Cause of Compressor Oil Shortage
256
Outdoor Unit Parts Replacement Methods
259
C. Board Exchange Procedures
272
Replacement of Indoor P.C. Boards
272
Replacement of Outdoor P.C. Boards
279
List of Service P.C. Boards
279
Configuration of Inverter Assembly
279
Interface Board (MCC-1606) Replacement Method
280
Comp-IPDU P.C. Board (MCC-1596) Replacement Procedure
281
Fan IPDU P.C. Board (MCC-1610) Replacement Procedure
283
Noise Filter P.C. Board (MCC-1608 A, B) Replacement Procedure
284
Exploded Diagram/Parts List
287
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