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Fisher & Paykel MR810 6.4REPLACING THE PCB, PCB, Model, Part Number, Supply Voltage, Table 5 : Spare PCB part numbers, Figure 6.4: Harness and power cable connections

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6.4REPLACING THE PCB

Table 5 : Spare PCB part numbers

		Model		Supply Voltage		PCB
					Part Number
		MR810A--		230 V~		043 042 232

		MR810J--		115 V~		043 042 233

		MR810G--		100 V~		043 042 234

1.	Open the case and remove the PCB (refer to § 6.2).
2.	Cut the cable tie holding the phase and neutral conductors to the PCB (refer to Figure 6.4).
3.	Slide the power cable and heater-wire adaptor clamp off the transformer support and lift away.
4.	Unscrew the power cable (phase, neutral, and earth), and the heater plate earth connection.
5.	Detach the heater-wire adaptor connector, the heater plate connector and the two heater plate thermistor
	connectors (refer to Figure 6.4).
6.	Unpack the replacement PCB and check that it is the correct voltage model from Table 5 above.
7.	Reconnect the power cable, secure the phase and neutral wires to the PCB using a small (2.5 mm wide)
	cable tie.
8.	Screw the heater plate protective earth into the protective earth terminal block.							6
9.	Reconnect the heater-wire		adaptor, heater plate harness			and two thermistors to their respective		6

locations.

Note: the primary and secondary thermistors can be connected to either location on the PCB.

10.Slide the power cable and heater-wire adaptor clamp onto the transformer of the new PCB.

11.Reinstall the PCB, and close the case (refer to § 6.8).

Primary

thermistor

connectionHeater Plate protective earth

Secondary thermistor

connectionMains protective earth

Heater wire adaptor

connection

Heater plate connection

Cable tie

Figure 6.4: Harness and power cable connections

MR810 Technical Manual Revision C REF 185042601

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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)