Toshiba HWS-802XWHT6-E, HWS-802H-E Work procedure, Remarks, Relay board, Electric parts assembly

No.	Exchange parts name	Work procedure	Remarks
4	Relay board	1. How to remove
	MCC-1431	1)Perform the step 1-1.
		2)Disconnect the connectors and lead cables
		connected to other parts from the relay board.
		1. Connector
		CN01: TB 01 3P Terminal block (3P: White)
		CN02: Water heat exchanger board (5P: White)
		CN10: TB 05 9P Terminal block (9P: White)
		Note
		When removing the connector, release the safety
		lock of the housing.
		3)Release the 3 stoppers of the relay board to remove
		the board.
			Relay board
5	Electric parts	1. How to remove
	assembly	1)Perform the step 1-1.
		2)Disconnect the connectors and lead cables
		connected to other parts from the water heat
		exchanger board.
		1. Connector
		CN200: Float switch (3P: Red)
		CN201: Pressure switch (2P: White)
		CN202: Bimetal thermostat (3P: Yellow)
		CN203: TC sensor (2P: Yellow)
		CN204: TWI sensor (3P: Brown)
		CN205: TWO sensor (2P: Red)
		CN206 THO sensor (3P: White)
		CN207: Lo pressure sensor (2P: Blue)
		CN212: Lo pressure sensor (4P: White)
		CN603: Pump (3P: Yellow)
		Disconnect the heater power source cable (For
		backup heater and hot water cylinder heater) from	Electric parts assembly
		the MgSW.
		Note
		When removing the connector, release the safety
		lock of the housing.
		3)Remove the fixed screws.
		(ST2T Ø4 × 8, 2 screws)
		4)Remove the electric parts assembly by pulling it
		toward you while pulling it upward because the
		assembly back side has a hook holding structure.

129