Sanyo XMHX1852, XMHX1252 Short the pin on the indoor control board, Increasing the Fan Speed

CAUTION	Be careful since the fan will start when you
	short the pin on the indoor control board.

(4)When the check of drainage is complete, open the check pin (CHK) and remount the insulator and drain cap onto the drain inspection port.

3-24. Increasing the Fan Speed

If external static pressure is too great (due to long extension of ducts, for example), the air flow volume may drop too low at each air outlet. This problem may be solved by increasing the fan speed using the following procedure:

(1)Remove 4 screws on the electrical component box and remove the cover plate.

(2)Disconnect the fan motor sockets in the box.

(3)Take out the booster cable (sockets at both ends) clamped in the box.

Power supply outlet

Inter-unit control wiring

Fig. 3-97 U

(4)Securely connect the booster cable sockets between the disconnected fan motor sockets in step 2 as shown in Fig. 3-98.

(5)Place the cable neatly in the box and reinstall the cover plate.

Electrical component box

Booster cable
Fan	Booster cable
motor
Fan motor socket
(At shipment)	(Booster cable installed)

Fig. 3-98

How to read the diagram

Indoor Fan Performance

(in. WG)			7, 12 Type
Pressure	0.60
	0.40		line
Static		Limit		line
			Limit					HT
External
	0.20						H
						M
					L
	0
	177			353

Air Flow (CFM)

(in. WG)			18 Type
	0.60
Pressure		line
	0.40	Limit
Static			line
		Limit
External	0.20		H
				HT

M

L

0

353530

Air Flow (CFM)

The vertical axis is the external static pressure (in. WG) while the horizontal axis represents the air flow (CFM). The characteristic curves for “HT,” “H,” “M” and “L” fan speed control are shown. The nameplate values are shown based on the “H” air flow. For the 24 type, the air flow is 635 CFM, while the external static pressure is

0.20in. WG at “H” position. If external static pressure is too great (due to long extension of ducts, for example), the air flow volume may drop too low at each air out- let. This problem may be solved by increasing the fan speed as explained above.

(in. WG) 0.60

PressureStatic	0.40
External	0.20
	0

24 Type

line
Limit
Limit	line	HT
		H
		M
		L
353		706

Air Flow (CFM)

(in. WG)

0.60

PressureStatic	0.40
External	0.20
	0

36 Type

Limit line

Limit line HT

H

M

L

706 1059 Air Flow (CFM)

NOTE HT: Using the booster cable

H:At shipment

Fig. 3-99

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