Air Stream Fan
AIR
for Dynamometers
Original Operating Instructions
D1 1301BA1-GB03
AIR
EDITION
Version 3 dated 14.08.2003
D1 1301BA1-GB03
© MAHA GMBH & CO. KG.
All rights reserved. Any reproductions of this document, partial or complete, are only allowed with
prior consent of MAHA GmbH & Co. KG.
All rights reserved in cases of patent granting or registration of design.
The contents of this version have been checked with great care. However, errors cannot be fully
excluded. Please contact MAHA should you find errors of any kind.
Subject to technical change without notice.
These instructions are intended for users with previous technical knowledge in the field of vehicle
testing technology as well as basic computer knowledge and MS-Windows operating system
application.
Windows and Windows for Workgroups is a registered trademark of the Microsoft-Corporation.
MANUFACTURER
MAHA Maschinenbau Haldenwang GmbH & Co. KG.
Hoyen 20
D-87490 Haldenwang/Allgäu
Telephone: 08374 / 585-0
Telefax: 08374/ 585-499
Internet: http://www.maha.de
e-mail: maha@maha.de
SERVICE
MAHA Maschinenbau Haldenwang GmbH & Co. KG.
- Service dept. Hoyen 20
D-87490 Haldenwang/Allgäu
Hotline: 08374 / 585 + extension
260 for brake testers, test lanes
280 for lifting technology
290 for performance testers, exhaust and air condidioning service equipment
Service: 08374 / 585-110 bis - 113, - 115
Telefax: 08374 / 585-491
II D1 1301BA1-GB03
AIR
TABLE OF CONTENTS
1 General Information .................................................................................................. 1
1.1 Preliminary Information .................................................................................................................. 1
1.2 Safety Instructions .......................................................................................................................... 1
1.3 Technical Specification .................................................................................................................. 2
1.4 Noise Emission .............................................................................................................................. 3
2 Installation and Operations ...................................................................................... 5
2.1 Installation ...................................................................................................................................... 5
2.1.1 Air Stream Fan AIR 1 and AIR 2 .................................................................................... 5
2.1.2 Air Stream Fan AIR 5 and AIR 7 .................................................................................... 6
2.2 Preparations before Starting the Fan ............................................................................................. 8
2.3 Switching On the Air Stream Fan ................................................................................................... 8
2.3.1 Cooling Fan with ON/OFF Switch ................................................................................... 8
2.3.2 Cooling Fan with Cable Remote Control ........................................................................ 9
2.3.3 Air Stream Fan with Infrared Remote Control .............................................................. 10
2.3.4 Air Stream Fan with 2 Increment-Air Flow Adjustment ................................................. 11
2.3.5 Air Stream Fan with Infinitely Variable Air Flow Adjustment ........................................ 11
2.4 Additional Fan .............................................................................................................................. 12
3 Troubleshooting ...................................................................................................... 13
D1 1301BA1-GB03 III
AIR
1 General Information
1.1 Preliminary Information
The air stream fan simulates the air stream that is normally produced during driving simulation of
motor vehicles during performance tests on roller dynamometers.
The air cooling fan blows cool air via a low-lying, large exhaust passage on the engine cooler and
under the vehicle. The engine temperature of the tested vehicles is thus maintained at normal
operational temperature. The heat accumulation underneath the vehicle is blown off, avoiding
damage to the corrosion protection of the automobile body and overheating of the the drive unit
and tires.
1.2 Safety Instructions
Read the standard operating procedures and user’s manual carefully before operating
the cooling air fan! MAHA will not accept any claims for damage or service costs occurred
due to non-compliance with these operating instructions.
The accident prevention rules and regulations of the Professional Association, the Workplace
Directive and the Reich Garage Directive, as well as the latest relevant VDE (Association of
German Engineers) regulations shall apply to the operation of the air cooling fan.
The official accident prevention regulations must be complied with at all times.
All work done on electrical parts of the equipment is to be carried out by trained, qualified
electricians or service technicians only. Before any kind of service or repair work is done,
disconnect the cooling air fan from all power supply and turn off the main switch, if
necessary!
The air cooling fan should be operated by trained personnel only!
Protect all parts of the installation from humidity and moisture!
The air cooling fan is only to be used for its intended purpose as described in the operating
instructions (Simulating the airstream which occurs during normal driving conditions while
conducting performance tests on roller dynamometers)!
Make sure that the cooling fan is properly and firmly positioned before starting operation!
Do not deposit any parts (tools, vehicle parts etc.) on the cooling fan!
Never insert any objects into the guard grilles of the cooling fan!
The noise emission value created when the air cooling fan is in operation is more than 70 dB
(A) in the work area of the operational personnel. Ear protection should be worn. The
protection should be approved for noise levels of up to 120 dB(A).
D1 1301BA1-GB03 1
AIR General Information
1.3 Technical Specification
Model Air 1 Air 2 Air 5 Air 7
Air output [m3/h] 6200 16500 21000 26500
Air stream [km/h] 70 70 78 98
Motor power [KW] 0,4 1,1 2,2 5,5
Fuse [A] 10 10 16 25
Power connection [V] 230 400 400 400
Version axial axial radial radial
Control Condensor Contactor Contactor Star/Delta
Dimensions
Depth [mm]
Width [mm]
Height [mm]
Weight [kg] 100 100 280 280
Swinging diameter [mm]
Depth [mm] with air flow
scoop
Model Air 7/1 Air 7/2 Air 5/5 Air 7/5
Air output [m3/h] 26500
Air stream [km/h] 98 78/98 0 - 78 0 - 98
Motor power [KW] 7,5 2,5/6 2,2 5,5
Fuse [A] 35 35 25 35
Power connection [V] 400 400 400 400
440
830
960
700
- - 995 995
710
1120
1054
890
21000/
26500
700
1665
960
-
0 - 21000 0 - 26500
1665
700
960
-
Version radial radial radial radial
Control Star/Delta Dalander Regulation Regulation
Dimensions
Depth [mm]
Width [mm]
Height [mm]
Weight [kg] 280 280 280 280
Swinging diameter [mm]
Depth [mm] with air flow
scoop
2 D1 1301BA1-GB03
700
1665
960
-
995 995 995 995
700
1665
960
-
700
1665
960
-
700
1665
960
-
General Information AIR
1.4 Noise Emission
The noise emission value created when the air stream fan is in operation is more than 70 dB (A)
in the work area of the operational personnel.
Ear protection should be worn !
The ear protection should be approved for noise levels of up to 120 dB(A).
D1 1301BA1-GB03 3
AIR General Information
4 D1 1301BA1-GB03
AIR
2 Installation and Operations
2.1 Installation
2.1.1 Air Stream Fan AIR 1 and AIR 2
Air stream fan AIR 1
A: Air exhaust
B: Handle to swing around the fan
The air stream fan AIR 1 is equipped with a power-supply plug (D) for 230 V mains supply. The
ON/OFF switch is situated on the back side of the fan.
The air stream fan AIR 2 must be connected to 400 V three-phase mains. The air stream fan is
equipped with 4 rollers and can therefore easily be moved to the intended point of use. To ensure
a stable position during operation, two of the rollers are equipped with a locking brake. Normally,
a cable remote control is used to switch on and off the cooling fan. If, however, a MAHA
dynamometer is used, the air stream fan can be operated with the dynamometer's remote control.
D1 1301BA1-GB03 5
C: Lever to lock the fan
D: Power-supply plug
AIR Installation and Operations
2.1.2 Air Stream Fan AIR 5 and AIR 7
Air stream fan AIR 5 and 7
A: Electro box
B: ON/OFF switch, rotary switch
(depending on model and equipment)
C: Connection to LPS
D: Power-supply plug for 400V three-
phase mains
F: Air entry
G: Lashings for the air flow scoop
H: Three-phase motor
I: Locking brake for guidance rollers
J: Air exhaust
E: Cable holder
The air stream fan AIR 5 is available in two different versions. The AIR 5 blows with a constant air
speed and is turned on and off via the dynamometer's remote control. The AIR 5/5 offers a
infinitely variable air flow adjustment which can be regulated manually via a rotary switch situated
on the cooling fan or automatically via the roller RPM of the dynamometer.
6 D1 1301BA1-GB03
Installation and Operations AIR
The air cooling fan AIR 7 is available in three different versions:
Model Air-output control
AIR 7, AIR 7/1 1 increment
AIR 7/2 2 increments
AIR 7/5 infinitely variable
The air stream fan AIR 7 and AIR 7/1 start up with reduced power and automatically change over
to full power approx. 10 seconds after switch-on.
The air flow of the air stream fan AIR 7/2 can be adjusted in two increments via a selector switch.
Air stream fan AIR 7/2
A: Switch /selector switch on position 'OFF'
B: Position 'low air flow' (21000 m
3
/h)
C: Position 'OFF'
D: Position 'high air flow' (26500 m
3
/h)
The air stream fan AIR 7/5 can be controlled either manually or automatically, just as the AIR 5/5,
but offers higher motor power.
D1 1301BA1-GB03 7
AIR Installation and Operations
2.2 Preparations before Starting the Fan
Before commencing the performance test, set up the cooling fan approx. 1.5 m - 2 m in front of
the vehicle to be tested. The test vehicle must be positioned with its driving axle or axles (4wd) on
the roller set of the dynamometer (LPS). Secure the guidance rollers of the cooling fan with the
locking brake (I) (Fig. 2-2) to ensure a stable and firm position during operation.
Up to three steps are necessary to connect the cooling fan:
Connection of the remote control cable to the LPS (AIR is switched on via remote control)
Connection of the control cable to the LPS (air flow adjustment via LPS)
Connection of the mains cable to the plug box (power supply).
Ear protection must be worn when the cooling fan is in operation!
AIR 1 and AIR 2 (Fig. 2-1):
The blower position of the AIR 1 and AIR 2 can be adjusted. To to that, loosen the two levers (C)
and use the handle (B) to adjust the fan in such a way that the air flow is directed at the engine
cooler of the vehicle. Now retighten the adjusting levers (C) manually.
AIR 5 and AIR 7 (Fig. 2-2):
For all AIR 5 / AIR 7 models, air flow scoops are optionally available in various versions. To install
the air flow scoop, use the lashings (G).
2.3 Switching On the Air Stream Fan
Depending on model and version determines how the air stream fan is switched on:
via a switch/push button on the electric box (Fig. 2-2)
and/or via remote control (e.g. remote control of the dynamometer)
via the keyboard of the dynamometer.
2.3.1 Cooling Fan with ON/OFF Switch
The ON/OFF switch (B) is located on the electro box. To put the cooling fan into operation, follow
the steps listed below:
a) Drive vehicle with its driven axle onto the roller set of the LPS
b) Position the cooling fan approx. 1.5 m - 2 m in front of the engine cooler
c) Lock the guidance rollers
d) Connect the mains cable
e) Turn switch to position ''
f) To switch off the fan, turn switch to position '0'
8 D1 1301BA1-GB03
Installation and Operations AIR
2.3.2 Cooling Fan with Cable Remote Control
The standard version of the air stream fan (except AIR 1) is equipped with a cable remote control.
A toggle- or rotary switch on the cable remote control facilitates easy operation of the cooling fan
directly from the vehicle.
If, however, a MAHA dynamometer of the 'old generation' is used, the air stream fan can be
operated via the dynamometer's remote control (included in the delivery volume). To do that, the
respective connection cable must be connected to the electro control cabinet of the
dynamometer. Proceed as follows to put the air stream fan into operation:
a) Drive vehicle with its driven axle onto the roller set of the LPS
b) Position the cooling fan approx. 1.5 m - 2 m in front of the engine cooler
c) Lock the guidance rollers
d) Connect the mains cable
e1) Connect the remote control to the control cable
e2) Connect the remote control connection cable to the LPS
f) Press the "air stream fan" key on the remote control
g) To turn off the fan, press the "air stream fan" key on the remote control again
Cable remote control
To turn on the air stream fan, set the toggle
switch (A) to position ''. To turn off the fan, set
switch (A) to position '0'.
The basic cable remote control model is
equipped only with a rotary- or toggle switch to
operate the air stream fan.
LPS 23/2 cable remote control
D1 1301BA1-GB03 9
AIR Installation and Operations
2.3.3 Air Stream Fan with Infrared Remote Control
If a MAHA dynamometer of the 'new generation' is used, the air stream fan can either be turned
on and off via the dynamometer's infrared remote control (included in the delivery volume) or via
the keyboard by using the function key 'F5'.
In order to operate the air stream fan via infrared remote control or keyboard, the respective
connection cable must be connected to the electro control cabinet of the dynamometer. Proceed
as follows to put the air stream fan into operation:
a) Drive vehicle with its driven axle onto the roller set of the LPS
b) Position the cooling fan approx. 1.5 m - 2 m in front of the engine cooler
c) Lock the guidance rollers
d) Connect the mains cable
e) Connect the remote control connection cable to the LPS
f) Press the "air stream fan" key on the remote control or the 'F5' -key on the keyboard
g) Press the "air stream fan" key on the remote control or the 'F5' -key on the keyboard again
to turn off
Infrared remote control
To turn on the air stream fan, press the key
with the symbol
infrared remote control once. Press this key
again to turn off the fan.
(A) on the LPS 2000
LPS 2000 remote control
(infrared)
10 D1 1301BA1-GB03
Installation and Operations AIR
2.3.4 Air Stream Fan with 2 Increment-Air Flow Adjustment
The air speed of the air stream fan AIR 7/2 can be adjusted in two increments (low/high air flow)
via a selector switch (see fig. 2-3). In order to switch over from low to high air flow, turn the rotary
switch first to position 'OFF'.
Proceed as follows to operate the fan :
a) Drive vehicle with its driven axle onto the roller set of the LPS
b) Position the cooling fan approx. 1,5 m - 2 m in front of the engine cooler
c) Lock the guidance rollers
d) Connect the mains cable
e1) Turn rotary switch to position (D) (Fig. 2-3) for high air flow
e2) Turn rotary switch to position (B) (Fig. 2-3) for low air flow
f) Turn rotary switch to position (C) (Fig. 2-3) to turn the fan 'OFF'
2.3.5 Air Stream Fan with Infinitely Variable Air Flow Adjustment
The air flow of the fans AIR 5/5 and AIR 7/5 is infinitely variable. There are two possibilities to
adjust the air flow:
manually
automatically
The air flow can be adjusted manually (between 0 and max.output) via a rotary switch which is
located on the electro box.
For the automatic air flow adjustment, the respective control cable must be connected to the
dynamometer. The air flow generated by the cooling fan is determined by the roller RPM of the
LPS. The generated air flow increases with the roller RPM.
Proceed as follows to put the cooling fan into operation:
a) Drive vehicle with its driven axle onto the roller set of the LPS
b) Position the cooling fan approx. 1.5 m - 2 m in front of the engine cooler
c) Lock the guidance rollers
d) Connect the mains cable
e) Turn switch to position '' to start the cooling fan
f) Adjust the air flow ('0' - 'max') with the rotary switch
g) To switch off the fan, turn switch to position '0'
D1 1301BA1-GB03 11
AIR Installation and Operations
2.4 Additional Fan
A
B
C
D
E
F
A: Handle to swing the fan
B: On-/Off switch
C: Cable holder
D: Plug for 400 V-rotary current
Fig.2-6: Additional fan
E: Air inlet
F: Locking device for guidance rollers
G: Air outlet
H: Bracket
H
A
G
B
The additional fan has a power supply plug (D) for the 400 V-rotary power supply. The On/Off
switch is on the backside of the unit.
The unit is equipped with 4 wheels and can be easily driven to where it is to be used. Two wheels
can be locked to guarantee that the unit sits securely during operation.
12 D1 1301BA1-GB03
AIR
3 Troubleshooting
Malfunction Possible cause Remedy
Cooling fan does not start
up
Fuse of control circuit has
Cooling fan cannot be
controlled via remote
control.
Accu of the remote control
Cooling fan does not start
up again
Motor protection switch
AUS/OFF
triggered
Control cable for remote
control not connected or
defective
decharged or defective
Thermal-lag switch has
triggered
Press motor protection switch
again;
enable fan via switch or
remote control.
Attention:
Drive motor may be damaged.
Replace fuse
Connect or check control
cable
Place remote control in
charging box or replace accu
Fan motor needs to cool
down.
Attention:
Drive motor may be damaged.
D1 1301BA1-GB03 13
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