Hitachi RAM-55QH4 Manuals

Manuals and User Guides for Hitachi RAM-55QH4. We have 1 Hitachi RAM-55QH4 manual available for free PDF download: Service Manual

Hitachi RAM-55QH4 Service Manual

Hitachi RAM-55QH4 Service Manual (110 pages)

ROOM AIR CONDITIONER

Brand: Hitachi | Category: Air Conditioner | Size: 17.59 MB

Table of Contents

Table of Contents
1
Specifications
1
Room Air Conditioner
1
Technical Information
1
Service Manual
1
Safety During Repair Work
2
Working Standards for Preventing Breakage of Semiconductors
3
Object Parts
3
Items to be Observed in Handling
3
Conductive Container
3
Grounding of the Working Table
4
Grounding a Soldering Iron
4
Specifications
6
- Hight Difference
  15
- Pipe Length
  15
Installation
15
Construction and Dimensional Diagram
22
- Fan Motor
  24
- Fan Motor Specifications
  24
Main Parts Component
24
- Compressor Motor Specifications
  25
- Compressor
  25
- Capacity Diagram (Related to the Ambient Temperature)
  26
- Cooling Capacity
  26
- Heating Capacity
  27
- Capacity Diagram (Related to the Piping Length)
  30
- Sound Pressure Level
  32
- Outdoor Unit
  34
Wiring Diagram
34
Circuit Diagram
36
Power Source
39
Block Diagram
39
- Basic Mode
  41
- Fan Speed by Mode
  42
- Room Temperature Shift Value
  42
- Basic Cooling Operation
  47
- Cooling Sleep Operation
  48
- Cooling Defrost
  48
- Dehumidifying
  49
- Dehumidifying Sleep Operation
  49
- Heating Basic Operation
  50
- Heating Sleep Operation
  51
- Expansion Valves
  52
- Compressor Rotation Speed
  52
- Defrost
  54
- Defrost Start Condition
  54
- Defrost Release Condition
  54
- Outputs During Defrost
  54
- Outputs During Auto-Fresh
  57
- Auto-Fresh Defrost
  57
- Release Condition of Auto-Fresh
  57
- Start Conditions for Auto-Fresh
  57
- Forced Cooling
  59
- Execution Condition
  59
- Operation Status
  59
- Processing at Overheat Thermistor (Oh) High Temperature
  61
- Restriction Start Conditions
  61
- Restriction Release Condition (in Common for All)
  61
- Power Circuit
  67
- System Power Module
  67
- Active Module
  67
Description of Main Circuit Operation
67
Trouble Shooting
95
- Discharge Procedure and How to Cut off Power to Power Circuit
  96
- Lighting Mode Self-Diagnosis Lamp
  97
- Troubleshooting of the System Power Module
  99
- How to Check Power Module
  100
- Checking Power Module Using Tester
  100
- Checking the Refrigerating Cycle
  101
- Disassembly and Reassembly
  102
- Electric Parts
  102
- Front Cover
  102
- Repairing Refrigerating Cycle
  103
- Condenser
  103
- Reversing Valve
  103
- Electric Expansion Valve & Pipe Thermistor Position Charts
  104
Parts List and Diagram
105

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