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Fisher & Paykel MR810 6SERVICING PROCEDURES, 6.1PRECAUTIONS, 6.2OPENING THE CASE AND REMOVING THE PCB, 6.2.1OPENING THE CASE

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6SERVICING PROCEDURES

NOTE: A complete list of spare parts in contained in Appendix C.

6.1PRECAUTIONS

WARNING:

Even if the MR810 is switched off with the power button, the unit is still energised. Disconnect the MR810 from the power supply before servicing.

After servicing the humidifier should be electrically safety tested (§ 7), and performance tested (§ 8), to ensure correct operation.

Ensure case screws are correctly fitted to the product after assembly. Replace the top case if any screw thread strips.

	Caution
	The MR810 contains electrostatically sensitive components. Ensure antistatic procedures are
	followed when servicing.
6	Do not use excessive force when re-fastening screws. (Refer to Table 6 for correct torque
6	settings).

6.2OPENING THE CASE AND REMOVING THE PCB

6.2.1OPENING THE CASE

WARNING:

Even if the MR810 is switched off with the power button, the unit is still energised. Disconnect the MR810 from the power supply before servicing.

1.Ensure mains plug has been disconnected from the wall socket.

2.Place the unit upside down and remove the three screws in the bottom cover (refer to Figure 6.1).

3.Pull the case front forward to disengage the two clips, then lift the front of the bottom cover up and then away (see Figure 6.1). Refer to the exploded diagram (Figure 8.1) for further dis/assembly detail.

18	MR810 Technical Manual Rev C REF 185042601

Contents

Page International United States Australia China Guangzhou Representative Office CONTENTS ELECTRICAL SAFETY TESTS ERFORMANCE EST ROCEDURE APPENDIX A: MAINTENANCE CHECKLIST 1 GENERAL INFORMATION 1.1INTRODUCTION 1.2GLOSSARY OF TERMS 1.3DEFINITIONS 1.4 SYMBOLS 1.5TECHNICAL MANUAL REVISION HISTORY 2SPECIFICATIONS MECHANICAL ELECTRICAL PERFORMANCE Temperature 2.4TRANSPORT AND STORAGE 2.5STANDARDS 3OPERATION AND CONTROLS 3.1 APPLICATION 3.2WARNINGS AND CAUTIONS 3.3SETUP 3.4CONTROLS AND INDICATORS 3.4.3"SEE MANUAL" INDICATOR Hardware Fault Microprocessor Fault 3.4.4 HEATER-WIRE INDICATOR 3.4.5AMBIENT TEMPERATURE SENSOR 3.5OPERATION 3.6DIAGNOSTIC PORT 4MAINTENANCE & CLEANING PROCEDURES 4.1CLEANING 4.2ANNUAL MAINTENANCE Page 5.2SEE MANUAL CODES See Fault Description Section Setting 6SERVICING PROCEDURES 6.1PRECAUTIONS 6.2OPENING THE CASE AND REMOVING THE PCB Figure 6.1: Removing the case bottom 6.2.2 REMOVING THE PCB 6.2.2 R PCB Figure 6.2: Removing the PCB 6.3REPLACING FUSES Model Supply Voltage Fuse Type Part Number 6.4REPLACING THE PCB PCB 6.5SERVICING THE HEATER PLATE Exploded Screw Application Driver Heater Plate Resistance Page Element 6.6REPLACING THE POWER CABLE OR HEATER-WIRE ADAPTOR Supply Power Cable Phase Neutral Page 6.7REPLACING THE PUSH BUTTONS AND THE LED LIGHT PIPE 6.8ASSEMBLING THE PCB AND CASE 6.9COMPLETING THE SERVICE 7ELECTRICAL SAFETY TESTS 7.1PROTECTIVE EARTH RESISTANCE 7.2EARTH LEAKAGE CURRENT 7.3INSULATION RESISTANCE 8PERFORMANCE TEST PROCEDURE 8.1INTRODUCTION 8.2FUNCTIONAL CHECK 8.3HEATER-WIRE MODE PERFORMANCE CHECK 8.4NON HEATER-WIRE MODE PERFORMANCE CHECK Appendix A: MAINTENANCE CHECKLIST Appendix A: M Pass/Fail Visual Check (refer § 4.1) Electrical Safety Check (refer § 7) Performance Check (refer § 8) Appendix B: PRODUCT HISTORY Date Change First Serial # Description of Change Appendix C: D Description (Figure 8.1) C.2 MR810 EXPLODED DIAGRAM C.3 HEATER PLATE PARTS LIST (Figure 8.2) C.4 HEATER PLATE EXPLODED DIAGRAM Appendix D: ELECTROMAGNETIC COMPATIBILITY Appendix D: E D.1 COMPLIANCE AND WARNINGS D.2 ELECTROMAGNETIC EMISSIONS D.3 ELECTROMAGNETIC IMMUNITY Recommended separation distance Recommended separation distances between portable and mobile RF communications equipment and the MR810 Rated maximum output Separation distance according to the frequency of transmitter (m)