Mitsubishi Electric GUG-01SL-E User manual

Warning:
Repair work must be performed by the manufacturer, its service
agent or a similarly qualified person in order to avoid hazards.
DIRECT EXPANSION COIL UNIT FOR LOSSNAY
HANDBOOK
February 2019 No. U220-A
MODELS
GUG-01SL-E
GUG-02SL-E
GUG-03SL-E
Nameplate
Note: "Direct expansion coil unit" is abbreviated as "Dx-coil unit."

Contents
1. Safety precautions .................................................................... 3-4
2. Names and functions of components ........................................... 4
3. Specifications ............................................................................... 5
4. Outside dimensions...................................................................... 6
5. Electrical wiring diagram ............................................................. 7
6. Circuit board diagrams ............................................................. 8-9
7. Troubleshooting .................................................................... 10-34
8. Overhauling procedures
....................................................... 35-46
9. Parts catalog
........................................................................ 47-65
GUG-01SL-E................................................................... 48-53
GUG-02SL-E................................................................... 54-59
GUG-03SL-E................................................................... 60-65

─3 ─
Read the following precautions thoroughly before the maintenance, and then inspect and repair the product in a
safe manner.
The types and levels of danger that may arise if the product is handled incorrectly are described with the warning
symbols shown below.
Warning
Modification is prohibited
Do not modify the unit.
(Failure to heed this warning may result
in electric shock, fire and/or injury.)
Electric shock
If you must inspect the circuitry while the power is
on, do not touch the live parts.
(Failure to heed this warning may result
in electric shock.)
Check insulation
Upon completing repair work, always measure the
insulation resistance. Verify that it is at least 10 MΩ
(with a 500-V DC insulation resistance tester), and
then turn on the power.
(Inadequate insulation may result in
electric shock.)
Incorrect handling of the product may
result in serious injury or death.
Proper electric work
Use the electric wires designated for electric work,
and conduct electric work in accordance with your
local "Electric Installation Engineering Standard",
the "Indoor Wiring Regulations" and the installation
instructions.
(Improper connection or wiring installation
may result in electric shock and/or fire.)
Replace damaged and/or degraded parts
Be sure to replace the power cord and lead wires if
they are damaged and/or degraded.
(Failure to heed this warning may result
in electric shock and/or fire.)
Use proper parts and tools
For repair, be sure to use the parts listed in the
service parts catalog of the applicable model and
use the proper tools.
(Failure to heed this warning may result in
electric shock, fire and/or injury.)
Caution against
electric shock
Prohibited
Be sure to follow
this instruction.
Turn off the power supply
Be sure to shut off the power supply isolator before
disassembling the unit for repair.
(Failure to heed this warning may result
in electric shock.)
Be sure to follow
this instruction.
1. Safety precautions
Be sure to follow
this instruction.
Be sure to follow
this instruction.
Be sure to follow
this instruction.
Use only the specified refrigerant (R410A) to
charge the refrigerant lines.
• Do not mix it with any other refrigerant and do not
allow air to remain in the lines.
( If air is mixed with the refrigerant, then it can cause
abnormal high pressure in the refrigerant line, and
may result in an explosion and other hazards. )
(
The use of any refrigerant other than that specified
for the system will cause mechanical failure or
system malfunction or unit breakdown. In the worst
case, this could seriously damage product safety.)
• Tighten all flare nuts as specified using
a torque wrench.
( If tightened too much, the flare nut can
break after an extended period. )
Toxic gas generation
• Be careful that the refrigerant (R410A) does not
leak in a flammable environment.
• Conduct welding operation in an open room.
• If the refrigerant gas leaks, open the windows while
servicing.
• Be sure to completely repair the leak. Close the
service valve if the repair work is temporarily sus-
pended.
( If the refrigerant gas comes into contact
with flames such as open fire, sparks
and a heater, it may generate toxic gas. )
Be sure to follow
this instruction.
Be sure to follow
this instruction.

─4 ─
Make sure that the product operates properly upon completion of repair. Clean the product and the surrounding
area, and then notify the customer of the completion of repair.
Notes for servicing
●Inspect the earth condition, and repair it if it is incomplete. Make sure that a power supply isolator or an over-
load protection device is installed, if it is not installed, recommend the customer to install one.
Caution Incorrect handling of the product may result in injury or
damage to properties including buildings and equipment.
Caution for injury
Do not work at a location where you do not have a
sure footing.
(Failure to heed this caution may result in
a fall.)
Wear gloves
Wear gloves when servicing.
(Failure to heed this caution may result in
injury to your hands from sharp metal or
other edges.)
Be sure to follow
this instruction.
Prohibited
Prevent water leakage
• Before removing any of the water-related parts,
completely drain the residual water from the piping.
• Upon completing repair work, be sure to check the
drainage of the unit and that no water leaks from
any of the piping connections.
(Water leakage may cause buildings to
soil, leading to secondary failure of other
parts.)
Be sure to follow
this instruction.
2. Names and functions of components
Heat exchanger
Drain pump
Control box
Supply air (SA) thermistor
(Only for GUG-02SL-E and GUG-03SL-E)
Note
The drain pump always runs in the cooling mode and continues to run for
six minutes after the unit stops.

─5 ─
3. Specifications
Model name Running current
(A)
Input power
(W)
Dimension (mm) Weight (kg)
Width Depth Height
GUG-01SL-E
Less than 0.1 A 2.5 W (Heating / Fan)
12.4 W (Cooling)
492 812 330 21
GUG-02SL-E 492 1034 394 26
GUG-03SL-E 461 1130 404 28
*The running current and the input power are based on 230 V/50 Hz.
Operation ranges
Lossnay unit Dx-coil unit Remote controller PZ-01RC
Outdoor air -15˚C to +40˚C (*1) - -
Return air (*2) +40˚C, 80%RH or less - -
Ambient condition
0˚C to +40˚C, 80%RH or less 0˚C to +40˚C, 80%RH or less 0˚C to +40˚C
(*1) -15˚C to -10˚C : Intermittent operation takes 60 min. for ON and 10 min. for OFF.
-15˚C or lower : Intermittent operation takes 55 min. for OFF and 5 min. for ON.
(*2) Air conditioned room air.
Guaranteed operation ranges [Outdoor air]
Operation mode Outdoor unit
PUHZ-ZRP35, PUHZ-ZRP50
PUHZ-ZRP71, PUHZ-ZRP100, PUHZ-ZRP125
Cooling (*3) -15˚C to +46˚C -15˚C to +46˚C
Heating -11˚C to +21˚C -20˚C to +21˚C
(*3) The optional air protection guide is required where the ambient temperature is lower than -5˚C.
Connectable Lossnay unit and outdoor unit for each function
[RA (Return Air) temperature control]
Dx-coil unit GUG-01SL-E GUG-02SL-E GUG-03SL-E
Connectable
Lossnay unit
LGH-50RVX-E LGH-65RVX-E LGH-80RVX-E LGH-100RVX-E LGH-150RVX-E
LGH-150RVXT-E
LGH-200RVX-E
LGH-200RVXT-E LGH-250RVXT-E
Connectable
outdoor unit
PUHZ-ZRP35 PUHZ-ZRP35 PUHZ-ZRP50 PUHZ-ZRP71 PUHZ-ZRP100 PUHZ-ZRP100 PUHZ-ZRP125
[SA (Supply Air) temperature control]
Dx-coil unit GUG-02SL-E GUG-03SL-E
Connectable
Lossnay unit
LGH-80RVX-E LGH-100RVX-E LGH-150RVX-E
LGH-150RVXT-E
LGH-200RVX-E
LGH-200RVXT-E LGH-250RVXT-E
Connectable
outdoor unit
PUHZ-ZRP50 PUHZ-ZRP50 PUHZ-ZRP71 PUHZ-ZRP71 PUHZ-ZRP71
Note: GUG-01SL-E cannot be used for the SA temperature control function.

─6 ─
4. Outside dimensions
GUG-01SL-E, GUG-02SL-E
63
E
30
492
P
G
M
B
C
ijQ
ijR
F
HJ
551
A
D
115 186
55
L K
52
N
47
Air inlet from
Lossnay
Ceiling suspension fixture
Gas pipeijT
Liquid pipeijS
Maintenance cover for drain pump, inlet air
thermistor and water detecting sensor
Heat exchanger
Control box
150 to 200
Drain pump
Drain pipe (O.Dij32)
Inspection
opening
450 x 450 or
more
SA
(supply air)
(4-13 X 20 oval)
Power supply
cable opening
Maintenance cover for SA thermistor
(GUG-02SL-E only)
An inspection opening is required for installation
and regular maintenance (check) of the drain
pump. When SA temp. control is selected,
another inspection opening may be required in
front of the unit for SA thermistor replacement
only when an error occurred on the SA
thermistor.
Ceiling suspension fixture
Model A B C D E F G H J K L M N P Q R S T
GUG-01SL-E 811 812 330 147 593 520 146 200 41 77 100 166 44 85 208 192 6.35 12.7
GUG-02SL-E
1033 1034 394 170 600 750 132 250 59 56 165 207 86 84 258 242 9.52 15.88
Unit (mm)
GUG-03SL-E
63
217
518
1130
49
14 250
290
250 47
461
750329
750
1156
30
459
97
404
14
52
115
340
55
78
Air inlet from
Lossnay
Gas pipe ij15.88
Liquid pipe ij9.52
Maintenance covert for SA thermistor
Maintenance cover for drain pump, inlet air
thermistor and water detecting sensor
Heat exchanger
150 to 200
Control box
Drain pump
Drain pipe (O.D ij32)
Inspection
opening
450 x 450
or more
SA
(supply air)
(4-13 X 20 oval)
Power supply cable opening
An inspection opening is required for installation
and regular maintenance (check) of the drain
pump. When SA temp. control is selected,
another inspection opening may be required in
front of the unit for SA thermistor replacement
only when an error occurred on the SA
thermistor.
Ceiling suspension fixture
Ceiling suspension fixture
Unit (mm)

─7 ─
5. Electrical wiring diagram
GUG-01SL-E, GUG-02SL-E, GUG-03SL-E
SA thermistor
(For GUG-02-E and GUG-03SL-E)
Dedicated remote controller PZ-01RC
(Accessory)
To Lossnay
(CN20)
(RED)
(RED)
CN20:RED
CN23:BROWN
CN29:BLACK
CN22:BLUE
Others: WHITE
(RED)
(YELLOW)
(WHITE)
(WHITE)
(WHITE)
(GREEN)
To outdoor unit
CN105
LED1
S1 L
N
E
S2
S3
TB6
CN9
CN10
CN120
CN3
CN2CN4
CN6
CN5
CN1
SW11
TM104
LED12
LED11
SW1 SW6
TAB1
CN20
CN23 CN21 CN29
CN22 CN82
TH11
TH2
TH5
SW2
SW3
SW4
LED5
LED4
LED3
LED2
LED6
LED7
TH9
Printed circuit
board B
(PCB B)
(GU-01-E)
Printed circuit
board A
(PCB A)
(IF013)
TRANS
DRAIN
PUMP
WATER
SENSOR
* PZ-61DR-E cannot be connected.
Fuse 3.15 A 250 V
Fuse
5 A 250 V
Definition of symbols
Printed circuit board A Printed circuit board B
TB6 : Terminal for power supply from the outdoor unit TM104 : Terminal for remote controller PZ-01RC
TAB1 : Connector (Ground) SW11 : Switch (Function selection)
SW1 to SW4 : Switch (Function selection) LED11 : Inspection indicator lamp
SW6 : Switch (Function selection) LED12 : Power supply indicator lamp
LED1 : Power supply indicator lamp CN1 : Connector (Power supply)
LED2 to 5 : Operation status CN2 : Connector (Transformer primary)
LED6 and 7 : Reading/Writing data from/to SD card CN3 : Connector (Drain pump)
CN105 : Connector (Communication to PCB B) CN4 : Connector (Transformer secondary)
CN20 : Connector (TH1, software use) CN5 : Connector (Communication to PCB A)
CN21 : Connector (TH2, liquid pipe temp.) CN6 : Connector (Output to PCB A)
CN22 : Connector (Remote controller) CN9 : Connector (TH9, supply air temp.)
CN23 : Connector (TH11, inlet air temp.) CN10 : Connector (Water sensor)
CN29 : Connector (TH5, gas pipe temp.) CN120 : Connector (Communication to Lossnay)
CN82 : Connector (Forced comp. OFF) : Terminal block
: Terminal block : Connector on PCB
: Connector on PCB
Notes:
1. TB6, TM104 and CN120 shown in dotted lines are field work.
2. Make sure to connect the earth wire.
3. Cut off the power supply (all to the Dx-coil unit, Lossnay unit and outdoor unit) more than five minutes prior to access the electrical parts.
4. The product shall be installed in accordance with national wiring regulations.

─8 ─
Transmission cable
to PCB B: CN105
1Not used
2GND
35 VDC
4Pulse signal
5Pulse signal
Power supply cable connection terminal: TB6
SW4
SW3
SW2
SW1
Function selection
switch
Power supplied: Lit
Power NOT supplied: Unlit
SW6
Lot number and
software version
indication
Inlet air thermistor:
CN23
S1, S2, S3
Connection to Outdoor unit
Earth
connection
Upper Lower
N, L
Power supply to
CN1 on PCB B
[Note] The following connectors and terminals are not used.
(CN2P, CN2A, CNX1 to CNX8, CN100, CN101, CN28, CN53, CN108 (SD card slot), and TB63)
Power supply
indicator
(LED1 Orange)
LED5
LED4
LED3
LED2
Fuse
3.15 A/250 V
Earth connection
Input cable to
PCB B: CN20
Normal…2 to 3 VDC
Error…4 to 5 VDC or
0 to 1 VDC
Input cable to PCB B: CN22
(Remote controller transmission line)
11 to 13 VDC
Input cable to PCB B: CN82
While compressor can be ON …12 to 14 VDC
While compressor is forced to stop…0 to 1 VDC
LED6
LED7
Liquid pipe thermistor:
CN21
Gas pipe thermistor:
CN29
CNS2 13:
Short
6. Circuit board diagrams
Circuit board diagram and check points
(1)Printed circuit board A (PCB A): IF013

─9 ─
(2)Printed circuit board B (PCB B): GU-01-E
Function selection
and model selection
switch
Power supplied: Lit
Power NOT supplied: Unlit
Available for GUG-02SL-E
and GUG-03SL-E
PCB Lot number indication
12 VDC
(Insulated)
Power of PCB B
SW11
SA temperature
thermistor: CN9
Drain pump outlet:
CN3
220-240 V/50 Hz
220 V/60 Hz
Transmission cable
to Lossnay: CN120
1Not used
2GND
35 VDC
4Pulse signal
5Pulse signal
Water sensor: CN10
14 4 to 5 VDC
Remote controller
(PZ-01RC)
connection terminal
(from PCB A):
TM104
11 to 13 VDC
Transmission cable
to PCB A: CN5
1Not used
2GND
35 VDC
4Pulse signal
5Pulse signal
GND for PCB B
(Insulated)
5 VDC (Insulated)
Transformer primary
(input): CN2
220-240 V/50 Hz
220 V/60 Hz
Transformer
secondary
(output): CN4
12 to 17 VAC
Indication of the
microcomputer
software version
Power supply
indicator
( LED12 Red)
Error indicator
( LED11 Green)
Output cable to PCB A: CN6
12: CN20 on PCB A
Normal…2 to 3 VDC
Error…4 to 5 VDC or 0 to 1 VDC
34: CN82 on PCB A
Signal output to force compressor to be OFF
While compressor can be ON …12 to 14 VDC
While compressor is forced to stop…0 to 1 VDC
56: CN22 on PCB A (Remote controller transmission line)
11 to 13 VDC
Normal : Unlit
Error or starting up: Blinking
Fuse
5 A/250 V
(PCB A Power supply
output: TB6 N, L)
PCB B Power supply
input: CN1
220-240 V/50 Hz
220 V/60 Hz

─10 ─
7. Troubleshooting
Work precautions
• Before starting the service, the power supply isolator must be turned off. Pay sufficient attention to avoid
electric shock or injury.
• When removing or touching the cables, circuit boards or other parts, make sure to turn off the power supply
isolator.
• Even after the power supply isolator is turned off, the capacitor on the circuit board retains high voltage for a
while. Therefore, before servicing, wait for at least five minutes, and then use a tester to check that the volt-
age has dropped.
• Terminals of a large electrolytic capacitor in the power circuit section continues to generate low-voltage for
approximately one hour after the power shutdown. Therefore, handle the circuit board very carefully when
replacing it.
• Once the power supply is turned off, be sure to wait for at least five minutes before turning the power back
on again.
• When servicing, be sure to reproduce the malfunction two or three times before starting repairs.
• When servicing, always take care to keep proper footing.
• When removing the circuit board, always hold it at both ends and remove carefully so as not to apply force
to the surface mounted parts.
• When removing the circuit board, be careful of the metal edges on the board.
• When removing or inserting the connectors for the circuit board, hold the entire housing section. Never pull
on the lead wires.
• If it is thought that there is a circuit board malfunction, check for disconnected wires in the print pattern,
burnt parts or discoloration.
• If the circuit board is replaced, make sure that the switch settings on the new board are the same as the old
board.
• Make sure to connect the power supply wires correctly.
The part names in the texts are standardized with the part names in the parts catalog. (There are some
exceptions.)