Avantco 178GDICE24FB User manual

Ice Merchandisers
Service Manual
www.AvantcoRefrigeration.com
11/2022
This manual is for a certified service technician and should not be used by those who are not properly trained.
This manual cannot cover all possible conditions that may occur and is not intended to be all encompassing.
You should read this manual in its entirety and the specific repair you wish to do prior to starting the repair.
This will allow you to determine if you have the correct tools, instruments, and skills to perform the procedure.
#178GDICE24FB 31" Black Indoor Glass Door Ice Merchandiser
#178GDICE24FW 31" White Indoor Glass Door Ice Merchandiser
Note:
Models:
Ice Merchandisers
#178GDICE49FB 53" Black Indoor Glass Door Ice Merchandiser
#178GDICE49FW 53" White Indoor Glass Door Ice Merchandiser
178GDICE49FB

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Ice Merchandisers
Service Manual
Troubleshooting..................................................................................................................................... 3
Temperature Controller Settings....................................................................................................... 5
Part Testing ............................................................................................................................................. 7
Controller Testing.................................................................................................................................. 7
Evaporator Fan Motor Testing ........................................................................................................... 7
Condenser Fan Motor Testing ........................................................................................................... 7
Compressor and Capacitor Testing.................................................................................................. 8
Part Repair............................................................................................................................................... 9
Temperature Controller ....................................................................................................................... 9
Evaporator Parts .................................................................................................................................... 9
Evaporator fan blade............................................................................................................................ 9
Evaporator fan motor ........................................................................................................................... 9
Evaporator Coil ...................................................................................................................................... 10
Cabinet temperature probe................................................................................................................ 10
Evaporator temperature probe.......................................................................................................... 10
Defrost element..................................................................................................................................... 10
Condenser Parts.................................................................................................................................... 11
Condenser coil....................................................................................................................................... 11
Condenser fan blade............................................................................................................................ 12
Condenser fan cover............................................................................................................................ 12
Condenser fan motor ........................................................................................................................... 12
Starting components ............................................................................................................................ 12
Compressor ............................................................................................................................................ 12
Filter drier ................................................................................................................................................ 12
Wire Diagram.......................................................................................................................................... 13
178GDIC24FB/W................................................................................................................. 13
178GDICE49FB/W .............................................................................................................. 14
Parts Diagram......................................................................................................................................... 15
178GDICE24FB/W .............................................................................................................. 15
178GDICE49FB/W .............................................................................................................. 17
Table of Contents

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Ice Merchandisers
Service Manual
Troubleshooting
Problem Possible Solution
Unit will not turn on
Ensure that unit is plugged in
Ensure the outlet is correct size, dedicated and has power to it
Check controller
Check compressor
Unit not getting to set
temperature
Ensure door is properly sealed
Check door gasket for rips, tears, cut, etc.
Ensure set temperature is correct
Ensure default parameters are correct on the controller
Check evaporator coil for ice or frost buildup
Ensure condenser coil is clean
Check door switch is functioning
Check if evaporator fan is operating
Check if condenser fan is operating
Check compressor operation
Check cabinet temperature sensor
Unit not holding set
temperature
Check door gasket is free of rips, tears, cuts, etc.
Ensure cabinet inside has good air circulation and is not blocking evaporator fan
Ensure parameters are correct on controller
Ensure condenser coil is clean
Ensure evaporator coil is clean and not frozen
Check door switch is functioning
Check if evaporator fan is operating
Check if condenser fan is operating
Check cabinet temperature sensor
Ensure defrost heating element is not on
Check compressor operation
Ice coming from inside
cabinet drain/pan
Check parameters are correct on controller
Check drain pan hose for clog
Check defrost heating element
Check evaporator fan and motor
Check drain hose heater

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Problem Possible Solution
Compressor is not running
Ensure unit is plugged in and turned on
Ensure controller parameters are correct
Check controller is telling compressor to run
Check start components
Check compressor for power
Unit turns o before
reaching set temperature
Ensure proper voltage on the plug
Ensure controller settings are correct
Ensure condenser coil is clean
Ensure controller is sending power to compressor
Check cabinet temperature sensor
Check compressor for power
Inside cabinet fan not
working
Check parameters are correct on controller
Check controller is telling evaporator fan to run
Check door switch
Check evaporator fan motor
Water is coming from
under the unit
Check drain hose is inside condensate pan
Check parameters are correct on controller
Check defrost element
Check drain hose for clogs
E0 error showing on
controller
Ensure wiring into controller is secure
Check cabinet temperature sensor
E1 error showing on
controller
Ensure wiring into controller is secure
Check evaporator temperature sensor
Troubleshooting
(Continued)

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Service Manual
Temperature Controller Settings
1. To access settings on temperature controller, hold the "Prg/mute" button and "Set" button
down simultaneously until the display flashes with a zero.
2. Push the "up arrow/aux" button until the display shows 22.
3. Press the "Set" button to enter the programming mode of the controller.
4. To save any changes that are made, press and hold the "Prg/mute" button until the set
point temperature shows on the controller display.
5. Use "Up" and "Down" arrows to change values for each option.
6. Press the "Set" button to keep the option.
Code Description Options Default
Unit of measure of temperature display 0 = °C
1 = °F 1
Evaporator fan runs during defrost mode 0 = Fan runs
1 = Fan does not run 1
Evaporator fan runs with compressor o 0 = Reference F0 option
1 = Fan always o when compressor o 1
Evaporator fan activation temperature
(Only functions if F0 = 1 or 2) -5° - 200° 41°
Fig. 1

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Code Description Options Default
Evaporator fan management
0 = Fan is always running
1 = Fan runs based on dierence of cabinet
probe temperature and evaporator probe
temperature
2 = Fan runs based on evaporator probe
temperature
2
Dripping time after defrost, evaporator fan is o 0 to 15 min. 2 min.
Maximum defrost duration/length 1 - 250 min. 30 min.
Temperature that defrost ends
(Temperature taken from defrost probe) -5° - 200° 58°
Maximum time between consecutive defrost cycles 0 = Unit will never go into defrost
1-250 = Time in hours 3 hours
Compressor, fan, and auxiliary start delay when unit is turned
on 0 - 15 min. 2 min.
Maximum set point for temperature for when in continuous
cycle mode r1 to 200° 10°
Minimum set point for temperature for when in continuous
cycle mode -50° - r2 -7.6°
Temperature dierential from set point (Tells compressor when
to turn back on after reaching set temperature) 0.1° - 20° 2.0°
Set point for when in continuous cycle mode r1 - r2 18°
Probe 2 calibration
(Evaporator temperature) -20° - 20° 0°
Probe 1 calibration
(Cabinet temperature) -20° - 20° 0°
Temperature Controller Settings
(Continued)

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Part Testing
Evaporator Fan Motor Testing
1. Ensure controller is calling for evaporator fan to run
(Fig. 3) then:
2. Check for 120 volts between yellow (fan) and white
(L) wires, fan ON only. (Fig. 4)
3. Check for 0.3 amps+/- 10% at yellow wire at rear of
controller. (Fig. 4)
4. If tests above fail, replace fan motor.
Condenser Fan Motor Testing
1. Ensure controller is calling for compressor to run
(Fig. 6) then:
2. Check for 120 volts at fan plug between the blue
and brown wires.
3. Check for 0.4 amps +/- 10% on blue wire.
(Fig. 7)
4. If tests above fail, replace fan motor.
Controller Testing
1. Check for 120 volts between black (L) and white (N)
wires, main power.
2. Check for 120 volts between red (compressor) and
white (L) wires, compressor ON only.
3. Check for 120 volts between gray (defrost) and
white (L) wires, defrost mode only.
4. Check for 120 volts between yellow (fan) and white
(L) wires, fan ON only.
Fig. 2
Fig. 3
Fig. 4 Fig. 5
Fig. 6
Fig. 7

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Part Testing
Compressor and Capacitor Testing
With the unit 'ON' and controller calling for the
compressor to run, check amperage on 'red' wire coming
from the controller, see table below for values +/- 10%
Disconnect wiring from compressor, check resistance
from common to run and start windings. Resistance
should be found (Run to Start = (Runs to Common) + (Start
to Common))
Temperature will change resistance OHM valves
Check windings are not connected to ground by
checking for Ohms from each pin to the shell of the
compressor (Paint must be removed from case when
checking for grounding)
Visually check capacitor for any deformations or leaking
oil like fluids, replace if any is found
Discharge capacitor prior to testing, use a 20,000 ohm, 2
watt carbon resistor, caution resistor will be HOT during
discharge
Capacitor micro-farads = µF +/- 5%, replace if not within
range
Model # Max Load
Amps
Locked Rotor
Amps (LRA)
178GDICE24FB/W 7.6 Amps 39.7 Amps
178GDICE49FB/W 10.6 Amps 55.2 Amps
Fig. 9
Fig. 10
Fig. 11
Fig. 8

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Part Repair
Temperature Controller
1. Ensure unit is turned o and unplugged.
2. Remove Phillips screws holding the front
condenser grill to the unit. (Fig. 12 & 13)
3. Remove the controls cover by squeezing both long
sides and lifting it away from the condenser grill.
(Fig. 14 & 15)
4. Push in on yellow button and slide yellow clamp
towards the rear on the controller. (Fig. 16)
5. Pull controller through mounting plate and remove
wiring (green and black connectors) Note locations
for new controller. (Fig. 17)
6. Installation is reverse of removal.
Evaporator Parts
1. Ensure unit is turned o and unplugged.
2. Open door of the unit and remove shelving as
required and rear shelf clips are needed.
3. Remove Phillips screws holding evaporator
drain cover and main panel in place to expose
evaporator parts. (Fig. 18)
Evaporator fan blade
4. Remove Phillips screw holding fan blade onto fan
motor. Note blade dish and direction. (Fig. 19)
Evaporator fan motor
5. Remove Phillips screws holding evaporator fan
motor to inside top of unit. (Fig. 20)
6. Remove screws holding mounting brackets to fan
motor with a Phillips screw driver and 7mm wrench.
Install brackets on new replacement fan. (Fig. 21)
7. Disconnect wiring from unit. (Fig. 22)
Fig. 12
Fig. 16 Fig. 17
Fig. 14 Fig. 15
Fig. 13
Fig. 18
Fig. 19 Fig. 20

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Evaporator Coil
Before removing evaporator coil, ensure all refrigerant has
been removed from the system following state, federal,
local and EPA regulations regarding refrigeration. Follow
all guidelines and safety procedures when working with a
flammable refrigerant. All connections where refrigerant
travels must be checked for leaks after connections are
brazed in place.
1. Remove capillary tube and suction line from evaporator
coil. Do not crush capillary tube. (Fig. 23)
2. Remove Phillips screws holding evaporator coil to inside
ceiling of the unit. (Fig. 23)
Cabinet temperature probe
3. Disconnect blue probe wiring from rear of controller.
(Fig. 24)
4. Open front door of unit and remove Phillips screw
holding probe cage in place. (Fig. 25)
5. Pry open probe cage to remove probe.
6. Use old probe wires to fish new probe wires through
the unit and back to the controller.
7. Reconnect to controller and secure new probe in cage
and mount to inside ceiling panel.
Evaporator temperature probe
8. Disconnect black wiring from rear of controller. (Fig. 24)
9. Open front door of unit locate probe inside evaporator
coil. (Fig. 26)
10. Use old probe wires to fish new probe wires through
the unit and back to the controller.
11. Connect new wires to controller and secure new probe
in evaporator coil.
Defrost element
12. Remove drain pan and blanket heater by removing
Phillips screws holding drain pan to evaporator. (Fig. 27)
Continued on next page
Part Repair
Fig. 23
Fig. 26
Fig. 24
Fig. 25
Fig. 27
Fig. 21 Fig. 22