Fisher FSK-94HF Operating manual

TECHNICAL & SERVICE MANUAL
CASSETTE TYPE AIR-CONDITIONER
(One-way cassette)
FSK-94HF
FI-SM-040830

1
One-way CassetteAir-conditioner
Table of Contants
Part 1. Product Features 2
Part 2. Specification 3
Part 3. Noise Level 5
Part 4. Velocity ﹠temperature distribution 6
Part 5. Operation Range 7
Part 6. Capacity Table 8
Part 7. Outlines and Dimension 9
Part 8. Electric Control Functions 10
Part 9. Wiring Diagram 16
Part 10. Installation 17
Part 11 Servicing and Maintenance 23
Part 12. Exploded view 26
NOTICE
Specifications are subject to change without notice for further improvement.
All the product information has been carefully checked.

Part 1. Product Features
1) Lower noise level
2) Smoother air flow with less turbulence
---Owing to the multiple-blade fan rotor and the air guide design, the airflow is getting smoother and more
comfortable
3) One direction air flow
---Quick cooling
4) Stylish design
---Be harmonious with any interior decoration and creates an elegant environment
5) Ultra thin machine body
---Space saving: only 235mm
6) Convenient installation
---Able to be flexibly installed in various corners
---Standardized sectional module
--- More flexible in routing the tube through the ceiling space due to the condensed water can be lift through
the drain pump up to 750mm above the drain port
7) Easier to do cleaning and maintenance
---Flat type suction grille of easy cleaning
2

3
Part 2. Specification
Model FSK-94HF
Power supply V-Hz-Ph 220-240V~,50,1
Capacity Btu/h 9000
Capacity kW 2.65
Input W 1098
Rated current A 4.87
Cooling
EER Btu/w.h 2,42
Capacity Btu/h 10000
Capacity kW 2,95
Input W 1102
Rated current A 4.84
Heating
COP Btu/w.h 2,68
MoistureRemoval L/h 1
Max. input consumption W 1320
Max.current A 6.2
Startingcurrent A 20
Model PG180X1C-4DZ3
Type Rotary
Brand Toshiba
Supplier TOSHIBA(Guangdong)
Capacity Btu/h 10800
Input W 1015
Rated current(RLA) A 4.5
Locked rotor Amp(LRA) A 19.8
Thermal protector UP3SE0591-T61
Capacitor uF 30UF/440-450V
Compressor
Refrigerant oil ml 400
Model YSK20-4
Brand Welling、Changheng
Input W 46
Capacitor uF 1.2UF/450V
Indoor fa
n
motor
Speed(hi/mi/lo) r/min 980/820/770
N
umber of rows 2
Tube pitch(a)x row pitch(b) mm 25.4x22
Finspacing mm 1.6
Fin type (code) Hydrophilic aluminium
Tube outside dia.and type mm
φ9.53x0.35
Innergroove tube
Coil length x height x width mm 600 x216x44
Indoor coil
N
umber of circuits 1
Indoor air flow (Hi/Lo) m3/h 470/320
Indoor noise level (Hi/Lo) dB(A) 38/35

4
Dimension (W*H*D)(body) mm 850x235x400
Packing (W*H*D)(body) mm 1080x310x460
Dimension (W*H*D)(panel) mm 1050x18x470
Packing (W*H*D)(panel) mm 1120x172x540
N
et/Gross weight(body) kg 23/27
Indoor unit
N
et/Gross weight(panel) kg 4/7
Model YDK25-6C
Brand Welling
Input W 85
Capacitor uF 2.5uF/450V
Outdoor fa
n
motor
Speed r/min 900
N
umber of rows 1
Tube pitch(a)x row pitch(b) mm 25.4x22
Finspacing mm 1.4
Fin type (code) Hydrophilic aluminium
Tube outside dia.and type mm
φ9.53x0.35
Innergroove tube
Coil length x height x width mm 754x508x22
Outdoor
coil
N
umber of circuits 2
Outdoor air flow m3/h 1900
Outdoor noise level dB(A) 42
Dimension(W*H*D) mm 780x540x250
Packing (W*H*D) mm 910x575x335
Outdoor
unit
N
et/Gross weight kg 36/39
Refrigerant type g R407c/850g
Designpressure MPa 1.2～3.5MPa
Liquid side/ Gas side mm(inch) φ6.35/φ9.53(1/4”-3/8”)
Max. refrigerant pipe length m 15
Refrigerant
piping
Max. difference in level m 5
Connection wiring AWG#22
Plug type No
Controller Remote
Operationtemp ℃17～30
Ambienttemp ℃（-7～45）
Notes: 1. Nominal cooling capacities are based on the following conditions:
Indoor temp: 27°CDB, 19°CWB; Outdoor temp: 35°CDB; Equivalent ref. Piping: 8m(horizontal)
2. Nominal heating capacities are based on the following conditions:
Indoor temp: 20°CDB; Outdoor temp: 7°CDB, 6°CWB; Equivalent ref. Piping: 8m(horizontal)
3. Actual noise level may differ, depending on the room structure, etc, since these noise values are from an
anechoic room.

Part 3 Noise Level
ONE-WAY CASSETTE TYPE
Microphone
1.0m
5
Octave band center fre
q
uenc
y
（
Hz
）
Sound pressure level dB（0dB=0.0002μbar）
Audibility limits of
continuous white
sound

Part 4 Velocity ﹠temperature distribution
Airflow velocity
Temperature
6

Part 5 Operation Range
Ensure the operating temperature is in allowable range.
Cooling only
Heat pump
7

8
Part 6 Capacity Table
Model: FSK-94HF
COOLING OUTDOOR TEMPERATURE DRY
Indoor Conditions 21ºC 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC
Total capacity kW 2.51 2.40 2.32 2.18 2.10 2.03 1.97
Sensitive capacity kW 2.01 1.92 1.85 1.75 1.68 1.62 1.57
21ºC D
15ºC W Input kW. 0.69 0.78 0.88 0.98 1.08 1.18 1.28
Total capacity kW 2.75 2.63 2.54 2.39 2.30 2.22 2.15
Sensitive capacity kW 2.20 2.10 2.03 1.91 1.84 1.78 1.72
24ºC D
17ºC W Input kW. 0.72 0.83 0.93 1.04 1.14 1.24 1.35
Total capacity kW 2.99 2.86 2.76 2.60 2.50 2.42 2.34
Sensitive capacity kW 2.39 2.29 2.20 2.08 2.00 1.93 1.87
27ºC D
19ºC W Input kW. 0.76 0.87 0.98 1.09 1.20 1.31 1.42
Total capacity kW 3.44 3.29 3.17 2.99 2.87 2.78 2.69
Sensitive capacity kW 2.75 2.63 2.54 2.39 2.30 2.22 2.15
32ºC D
23ºC W Input kW. 0.88 1.00 1.13 1.25 1.38 1.50 1.63
Model: FSK-94HF
HEATING OUTDOOR TEMPERATURE
Indoor
Conditions 24ºC D 18ºC W 12ºC D 11ºC W 7ºC D 6ºC W 4ºC D 3ºC W 0ºC D -1ºC W -5ºC D -6ºC W -7ºC D -8ºC W -15ºC D -16ºC W
Capacity kW 3.60 2.88 2.40 2.16 2.04 1.62 1.68 1.56
15ºC Input kW. 1.32 1.06 0.88 0.84 0.79 0.75 0.70 0.62
Capacity kW 4.05 3.24 2.70 2.43 2.30 2.03 1.89 1.76
18ºC Input kW. 1.49 1.19 0.99 0.94 0.89 0.84 0.79 0.69
Capacity kW 4.50 3.60 3.00 2.70 2.55 2.25 2.10 1.95
20ºC Input kW. 1.65 1.32 1.10 1.05 0.99 0.94 0.88 0.77
Capacity kW 4.95 3.96 3.30 2.97 2.81 2.48 2.31 2.15
22ºC Input kW. 1.82 1.45 1.21 1.15 1.09 1.03 0.97 0.85
Capacity kW 5.85 4.68 3.90 3.51 3.32 2.93 2.73 2.54
27ºC Input kW. 2.15 1.72 1.43 1.36 1.29 1.22 1.14 1.00

Part 7 Outlines and Dimension
1. Indoor unit
9
4-Install hanger E-parts box
Drain hole Liquid side Gas side
Air outlet frame
Name
Drain hole Φ38mm
Liquid side Φ6.35
Gas side Φ9.53
2. Outdoor unit
FSO-94HF

Part 8. Electric Control Functions
1. Performance Index
No. Item Index
1 Applicable Voltage Range 165-253V~
2 A/C Frequency 50Hz
3 Working environment temperature -7°C- +45°C
2. Main Parts Introduction
2.1 Indoor Fan
High speed and low speed.
Breeze speed for anti-cold air.
2.2 Outdoor Fan
Only one speed.
2.3 Buzzer
2.3.1 It will buzz when its driving port in the main chip outputs high level.
2.3.2 It will buzz once when the main frame receives remote start-up signal.
2.3.3 It will buzz once for 1 second when receiving turn-off signal.
2.3.4 It will buzz for 0.5 second once receiving other signal.
2.3.5 It will not buzz when receiving abnormal signal.
2.4 Indicator
2.4.1 There are 4 indicators: operating indicator, timer indicator, water level warning indicator, defrosting
indicator and pre-heating indicator (wind-delivery indicator for cooling-only A/C).
2.4.2 LED indicates errors when protection is in effective.
2.5 Four-way Valve
It is controlled by relays.
2.6 Condensate Pump
It is controlled by relays.
3. Operation Modes and Functions
3.1 Manual Operation
3.1.1 The manual operation mode is controlled through “manual” pad in the wind in-take grid, including such two
modes as manual action and manual cooling. Push the manual pad for each switchover, the order for which
is shown below:
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REMOTE CONTROL MANUAL ACTION MANUAL COOLING
3.1.2 Manual Cooling
3.1.2.1 Under this mode, no remote control signal will be received.
3.1.2.2 The compressor is started up unconditionally and the rotating speed of indoor and outdoor fans is set to be
in high and forced cooling operation. At the same time, the wind grille is forced to swing (irrelevant to

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temperature setting and environment temperature) and will be automatically switched over to manual
mode 30 minutes later, under which manual mode will be in effective.
3.1.2.3 Under this mode, the buzzer will buzz twice with each lasting 0.5 second at 0.5 interval. During the first
30 minutes of unconditional forced cooling operation, the operation indicator will blink at 0.5Hz. In the
process of switchover to manual action mode, the buzzer buzzes for 0.5 second and the indicator is
illuminated.
3.1.2.4 Under this mode, the corresponding protections are in effective (3- minute delayed start-up, over current,
outdoor protection and evaporator low temperature protection.). Corresponding protection will act once
any protection is in active.
Push “manual” pad once to end this mode and enter the remote control pending status. The buzzer will
buzz for 1 second and the indicator turn off.
3.1.3 Manual Action
3.1.3.1 Under this mode, the remote signal will be received and corresponding actions will be taken accordingly
upon the receipt of the remote signal.
3.1.3.2 On entering this mode, the buzzer will buzz for 0.5 second and the indicator on.
3.1.3.3 The system will operate under the auto mode whose temperature is set to be 24°C and at the same time,
the wind grille will swing automatically.
3.1.3.4 Under this mode, corresponding protections are in effective.
3.1.3.5 Push “ manual” pad to end this mode and switch over to manual cooling mode.
3.2 Heating Mode
3.2.1 Four-way valve opens at once, while defrosting process closes.
3.2.2 Condition for the compressor action: (Ts = set temperature, Ta = room temperature)
Condition Compressor Outdoor fan
Ta > Ts+4 Off Off
Room temp. up
Ta <Ts+4 On On
Ta < Ts+3 On On
Room temp. down
Ta >Ts+3 Off Off
3.2.3 Indoor Fan Action
3.2.3.1 Anytime remote switchover for fan speed among high/low/auto(anti-cold air function takes priority).
3.2.3.2 Anti-cold air:
Switchover between fan speed and fine tune can be set according to temperature of evaporator pipe.
Condition
T= Indoor exchanger temp.
Indoor fan speed
T<25°C Off
25°C <T<32°C Breeze
Indoor exchanger temp. up
T>32°C Setting fan speed
T> 30°C Setting fan speed
15°C <T<30°C Breeze
Indoor exchanger temp. down
T<15°C Off
During anti-cold air period, if indoor fan is shut down, then pre-heating/defrosting lamp is on. Once indoor
fan starts, pre-heating/defrosting lamp will be off.

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3.2.3.3 Auto fan of indoor fan under heating mode.
Condition (T =Indoor Temp.-Setting Temp.) Indoor fan speed
T<3 HighRoom temp. up
T>3 Low
T> 1 LowRoom temp. down
T<1 High
3.3 Defrost (only available to heating mode)
3.3.1 The defrosting is processed by indoor control board.
3.3.1.1 Defrosting Conditions
3.3.1.1.1 Low temperature defrosting condition:
Accumulated operating time when temperature of outdoor heat exchanger coil T3 is below -2°C reaches
up to over 40 minutes.
3.3.1.1.2 High temperature defrosting condition:
Under high temperature protection of evaporator, the time when outdoor fan is shut down but compressor
is not has been accumulated for up to 90 minutes. It is considered that defrosting is performed when
either 3.3.1.1 or 3.3.1.2 is met.
3.3.1.2 Defrosting Action
Four-way valve and outdoor fan are shut down. Indoor fan operates according to anti-cold air function.
Compressor keeps on continuously.
3.3.1.3 Ending Of Defrosting Condition
It is considered that defrosting condition is ended when any of the conditions is met:
3.3.1.3.1 Operating current of compressor reaches 1.5Ie.
3.3.1.3.2 Time of defrosting reaches 10 minutes.
3.3.1.3.3 Temperature of outdoor coil T3 is up to 20°C.
3.3.1.4 Ending Action of Defrost
3.3.1.4.1 Outdoor fan and four-way valve are open.
3.3.1.4.2 Compressor keeps on continuously.
3.3.1.4.3 Indoor fan acts according to anti-cold air function.
3.3.1.4.4 Defrosting/pre-heating lamp continues to be on until indoor fan starts up.
3.4 Cooling Mode
3.4.1 Four-way valve is closed. If four-way valve is open before the machine enters cooling mode, then four-way
valve will be closed at the first time the compressor starts under the cooling mode.
3.4.2 Conditions for the compressor and outdoor fan action (Ts = set temperature, Ta=room temperature)
Condition Compressor Outdoor fan
Ta> Ts+1 On OnRoom Temp. up
Ta<Ts+1 Off Off
Ta> Ts On OnRoom Temp. down
Ta<Ts Off Off
3.4.3 Action of Indoor Fan
3.4.3.1 HIGH/LOW/AUTO fan can be switched over for your comfort.
3.4.3.2 Auto fan under cooling mode.

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Condition (T=Indoor Temp.-Setting Temp.) Indoor fan speed
T<4 LowTemp. up
T>4 High
T> 1 HighTemp. down
T<1 Low
3.5 Dehumidifying Mode
3.5.1 Dehumidifying mode is the cooling operation, under which the indoor fan is high and outdoor fan is low.
3.5.2 Protective condition is actived.
3.6 Auto Mode
3.6.1 Under auto mode, the indoor fan is set to be auto (refer to auto fan under cooling, heating).
3.6.2 When entering auto mode, the heating, fan only or cooling operation will be automatically chosen according
to the room temperature Ta and the set temperature Ts.
3.6.2.1 When Ta < Ts - 1°c, it performs the heating operation with a set temperature of Ts - 1°c (refer to the
heating mode). However the cool only model will be in low fan.
3.6.2.2 When Ts + 2°c ≥Ta ≥Ts - 1°c, control according to cooling auto fan with a set temperature of 23°c.
3.6.2.3 When Ta > Ts +2°c, it performs the cooling operation with a set temperature of Ts (refer to the cooling
mode).
3.6.3 After one mode is chosen, if the condition Ta > Ts+1°c or Ta < Ts - 1°c lasts for 15 minutes, meanwhile the
compressor doesn't start up within consecutive 15 minutes, the operation mode will be re-chosen according
to the Ta and Ts.
3.6.4 Protective condition is actived.
3.7 Fan Only Mode
3.7.1 Under this mode, four-way valve, compressor and outdoor fan are shut down.
3.7.2 High/Low/Auto fan can be switched over through manual control. Auto fan will be controlled in line with
cooling auto fan with temperature set to be 23°C.
3.7.3 After entering fan mode, the operating indicator is on. If the model is cooling only mode, fan indicator is on
at the same time.
4. Other Functions
4.1 LED Display
Operation lamp, timer lamp, defrosting/pre-heating lamp, and water level alarm lamp.
4.1.1 Operation Lamp
When the operation is recovering, it will blink at 1 Hz.
After the air-conditioner is on, the lamp will keep on.
After the air-conditioner is off, the lamp will be off.
When the air-conditioner is switched over from manual cooling to remote control, the lamp will be off.
4.1.2 Timer Lamp
During timer operation, it will be on.
4.1.3 Defrosting/Pre-Heating Lamp
When heat pump model performs defrosting or anti-cold air, it will be on.

14
4.1.4 Water Level Alarm Lamp
When water level is above the alarm level, it will blink at 5Hz.
4.2 Timer
Refer to remote controller manual for detail operation.
Note: The timer is valid for one operation of the A/C.
4.3 LouverAction
It is controlled by relays.
4.4 Condensate Pump
4.4.1 The action of the water pump is controlled by water level switch.
4.4.2 Control procedures (check water level every 5 seconds )
4.4.2.1 When entering cooling mode, dehumidifying mode or forced cooling mode, condenser starts at once and
operates continue until the above modes stop.
4.4.2.2 Under stand-by, heating or fan mode, if the water level in water receiver rises to the position of the water
switch, the controller will make LED flashing to give warning signal, and at the same time forces compressor to
stop and the drain pump start. The water level will be checked continuously. If the water level falls to warning
water level, the warning signal will disappear( the drain pump delay 1 minute to be off), compressor starts again(3
minutes protection takes priority), and operation recovers according to former setting mode. On the other wise,
after 3 minutes, the whole unit stops(including drain pump) and warning signal can”t disappear. It can”t recover
unless out of power.
5. Trouble Shooting
5.1 Protective Function
5.1.1 3-minute delay for the compressor start-up.
At the beginning of energizing or after the stop of the compressor, 3-minute delay will be needed to start the
compressor.
When switchover between cooling/heating mode, the compressor stops automatically.
5.1.2 The AC don”t check the compressor current through electric control system, but use compressor self current
protection.
5.1.3 Evaporator protection against high temperature(heating mode)
Only available to heating mode, including heating mode, heating operation under auto mode.
※ Note: During protection, the indoor fan continues operating at a setting speed, while the anti-cold air function
of heating and the compressor will be 3 minute delayed to shut down for protection.
5.1.4 Evaporator Protection against low temperature(cooling mode)
5.1.4.1 When the evaporator pipe temperature ≤3°c and this lasts for 3 minutes, the compressor and outdoor fan
will be shut off.
5.1.4.2 When the evaporator pipe temperature ≥7°c, it recovers.
5.1.4.3 The restart of the compressor shall execute the delay protection.

15
5.1.5 Anti-cold air protection
Only available to heating mode, including heating mode, heating operation under auto mode.
5.1.6 Condenser high temperature protection
5.1.6.1Only available to cooling (incl. cooling mode, cooling operation under auto mode) and dehumidifying
mode.
5.1.6.2 Delay protection should be performed when the compressor restarts.
5.1.7 Water level protection
5.2 Self-diagnosis
5.2.1 Indoor unit
No. Type Contents LED Flashing Remark
1 protection Over current protection of the compressor
occurs 4 times in 1h
Lamps of operation, timer,
defrosting (only fan )
flashing simultaneously at
5Hz.
Whole unit is shut down.
It cannot recover unless
power is cut off
2 protection Outdoor protection (absent phrase, phrase
sequence and temperature protection)
All lamps flashing at 5Hz
3 error Room temperature sensor checking channel
is abnormal
Timer lamp flashing at 5Hz
4 error Evaporator sensor checking channel is
abnormal
Operation lamp flashing at
5Hz
5 error Condenser sensor checking channel is
abnormal
Defrosting lamp flashing at
5Hz
6 error Temperature fuse is melt(reserved) Operation lamp and timer
lamp flashing at 5Hz
Recover automatically
after errors are eliminated

Part 9. Wiring Diagram
1. FSK-94HF
Indoor Unit
KM1
LN( 2 ) 1 3 4
XT2
XT1
PUMP
K3
M
CN1 - CN2 4
XS1 ~ 6
RT1
RT 2
XT1
KM1
CAP1
FAN1
XP1~6
T4
FSO-94HF Outdoor Unit
16
RED
TO I NDOOR U NI T ( X T1 )
TO I NDOOR UNI T ( X T2 )
T3 E
FAN
Y/ G
BLUE
RE D
BLACK
RE D
OVERL OAD
REL AY
Y/ G
BLACK
Y/ G
RED
BLUE
BLUE
4- WAY
VALVE
BLACK
BLUE

Part 10 Installation
1. Installation place
●A place where there is enough room for installation and maintenance.(Refer to Chart 1)
●The ceiling is structurally sound to hold the Indoor Unit.
●A place that is well ventilated and the influence of weather is the least.
●A place that the airflow can reach every corners of the room.
●A place where the drain pipe can reach out easily.
Refrigerant Pipe
100mm
above
Ceiling
200mm
above
245mm
above
100mm
above
Chart 1
●Install the outdoor unit on a rigid base to prevent increasing noise level and vibration.
●Determine the air outlet direction where the discharged air is not blocked.
●In the case that the installation place is exposed to strong wind such as a seaside or high position, secure the
normal fan operation by putting the unit length wise along the wall or using a duct or shield plates.
●Specially in windy area, install the unit to prevent the admission of wind.
2. Indoor unit installation
Adjust the indoor unit and the ceiling hole with Installation Model Paper applied. Fix the Model Paper on the
main body of the air conditioner with five screws (M4x16) applied.
1. Installing φ10 hanging screw bolt. (4 bolts)
2. Overhanging the Indoor unit
Note: Do not lean the air conditioner when overhanging it because drain pump and water lever switch are
installed inside.
Adjust the gasket (down side) to 137mm over the ceiling.
Hanging Bolt
Nut (Up Side)
Gasket
Installing Ear
Gasket (Down Side)
Nut (Down Side)
Down Side of the ceiling
137mm
17

●Install the hanging bolt into U groove of the hanging tool. Overhang the indoor unit and ensure it is &&level
using a level indicator.
Model Paper
Panel Fixing Screw
Hole
Outline of Indoor Unit
Ceiling Hole Width
Ceiling Hole Length
15 15
1010
50
110
430
Install the ceiling with the screws used to install Model Paper.
●Secure the Model Paper to the down side of Indoor Unit with Screws used to fix panel.
Model Paper
Down Side of Model Paper Down Side of Ceiling
Out over 0mm
Indoor Unit
In over 3mm
Indoor Unit
Indoor Unit
Down Side of
Model Paper
Down Side
of Ceiling
Level
●Fasten the nut to secure the Indoor Unit.
3. Panel installation
Make sure the following before installing the panel:
●Downside of Indoor Unit and Ceiling must be in the same plane.
●Indoor Unit must be parallel with the Ceiling Hole.
●Check if there is water in the drain pipe.
Installation Procedure
(1). Remove screws on panel
●Panel Screws (M4x16) include the four screws used to install Model Paper of the Indoor Unit and the one screw
used to fix central of Indoor Unit temporarily.
●Do not use Model Paper when installing the panel.
●Remove Panel Screws and Model Paper.
Positioning Board Screw
18

(2). Hang the Panel
●Hang the panel at the hook of Indoor Unit left side.
Hook
Panel
Hook
Panel
(3). Lead the Swing Motor Wire and Remote Controller Wire into the hole at Indoor Unit left side from outside.
Hole
Connectors (white)
Swing Motor Wire
Electrical Control Box
(4). Fasten the screws
●Lift right side of the panel, then hang the hook of the panel into the buckle at right side of the &&&Indoor
Unit.
Buckle
Indoor Unit
Hook
●Push Inlet Grille (PUSH is marked), then open it.
Swing
Inlet Grille
●Connect Panel with Swing Motor Wire Connector (white) and Remote Controller Wire Connector after
passing through a hole.
Hole
Swing Motor Wire
19