Haier GE Vertical Zoneline AZ90E09D C How to use

31-9269
Vertical Zoneline
Technical Service Guide
June 2017
AZ90E09D_C
AZ90E12D_C
AZ90E18D_C
AZ91H09D_C
AZ91H12D_C
AZ91H18D_C
AZ91H09E_C
AZ91H12E_C
AZ91H18E_C
AZ91H18E_S Rear View
9K, 12K,
18K Small
Chassis
18K
Large
Chassis

– 2 –
Safety Information
IMPORTANT SAFETY NOTICE
The information in this service guide is intended for use by
individuals possessing adequate backgrounds of electrical,
electronic, and mechanical experience. Any attempt to repair a
major appliance may result in personal injury and property
damage. The manufacturer or seller cannot be responsible for the
interpretation of this information, nor can it assume any liability in
connection with its use.
WARNING
To avoid personal injury, disconnect power before servicing
this product. If electrical power is required for diagnosis or test
purposes, disconnect the power immediately after performing the
necessary checks.
RECONNECT ALL GROUNDING DEVICES
If grounding wires, screws, straps, clips, nuts, or washers used to
complete a path to ground are removed for service, they must be
returned to their original position and properly fastened.
GE Appliances
Technical Service Guide
Copyright © 2017
All rights reserved. This service guide may not be reproduced in whole or in
part in any form without written permission from GE Appliances.

– 3 –
Table of Contents
Safety Information........................................................................................................................2
Table of Contents..........................................................................................................................3
Safety Requirements....................................................................................................................5
Nomenclature...............................................................................................................................6
Introduction...................................................................................................................................7
Changes to Design.......................................................................................................................7
Features.......................................................................................................................................8
Electronic Control Sequence Of Operation..................................................................................9
Low Voltage Interface Connections......................................................................................11
Remote Wall Thermostat......................................................................................................11
Connecting a Remote Wall Thermostat................................................................................12
Desk Control.........................................................................................................................13
Auxiliary Fan Control ............................................................................................................13
Service..................................................................................................................................13
Installation....................................................................................................................................14
Utility Closet Connection Locations......................................................................................14
Small Chassis...............................................................................................................................15
6PDOO&KDVVLV&RPSRQHQWV,GHQWL¿FDWLRQV ..................................................................................16
Small Chassis Component Access...............................................................................................18
Control Panel Access ...........................................................................................................18
Transformer (265 Volt Models).............................................................................................19
Heater...................................................................................................................................19
Large Chassis ..............................................................................................................................21
/DUJH&KDVVLV&RPSRQHQWV,GHQWL¿FDWLRQV ..................................................................................22
Large Chassis Control Panel........................................................................................................23
Large Chassis Component Access ..............................................................................................24
Heater and Bracket Indoor Blower Assembly.......................................................................24
Indoor Motor and Blower Assembly......................................................................................25
Outdoor Motor and Blade Assembly.....................................................................................25
Outdoor Shroud Assembly....................................................................................................26

– 4 –
Right Side Components........................................................................................................26
Fault Codes and Alarm Status......................................................................................................27
(OHFWURQLF&RQWURO%RDUGV&RPSRQHQWV,GHQWL¿FDWLRQ ..................................................................29
Main Board Front..................................................................................................................30
Components Testing.....................................................................................................................31
Refrigeration Sequence of Operation...........................................................................................34
Sealed Refrigeration System Repairs..........................................................................................36
Regrigerant Charging...........................................................................................................36
Method of Charging / Repairs...............................................................................................36
Undercharged Refrigerant Systems.....................................................................................37
Overcharged Refrigerant Systems.......................................................................................37
Restricted Regrigerant System.............................................................................................38
Hermetic Components Check ......................................................................................................39
Thermistors' Resistance Values....................................................................................................45
Electrical Troubleshooting Chart ..................................................................................................46
Cooling 9K BTU, 12K BTU, & 18K BTU...............................................................................46
Electrical Troubleshooting Chart Heat Pump ...............................................................................47
Schematic.....................................................................................................................................48
Accessories..................................................................................................................................49
GE Vertical Zoneline Warranty .....................................................................................................50
Index.............................................................................................................................................51

– 5 –
Prior to disassembly of the GE Vertical Zoneline to access
components, GE Factory Service technicians are REQUIRED to
follow the Lockout / Tagout (LOTO) 6 Step Process:
Safety Requirements
GE Factory Service Employees are required to use safety glasses with side shields, safety gloves and
steel toe shoes for all repairs.
Steel Toed Work Boot Electrically Rated Glove and
Dyneema® Cut Resistant
Glove Keeper Dyneema®Cut Resistant
Glove
Plano Type Safety Glasses
Prescription Safety Glasses
Safety Glasses must be ANSI
Z87.1-2003 compliant
Brazing Glasses
Cut Resistant Sleeve(s)
Step 1
Plan and Prepare Step 4 Apply LOTO device and lock
Step 2
Shut down the appliance Step 5 Control (discharge) stored
energy
Step 3
Isolate the appliance Step 6 “Try It” verify that the appliance
is locked out

– 6 –
Nomenclature
The nomenclature breaks down and explains what the letters and numbers mean in the model number.
Serial Number
7KH¿UVWWZRFKDUDFWHUVRIWKHVHULDOQXPEHULGHQWLI\WKHPRQWKDQG\HDURIPDQXIDFWXUH7KHOHWWHU
designating the year repeats every 12 years.
Example: LA123456S = June, 2013
A – JAN
D – FEB
F – MAR
G – APR
H – MAY
L – JUN
M – JUL
R – AUG
S – SEP
T – OCT
V – NOV
Z – DEC
2024 – Z
2023 – V
2022 – T
2021 – S
2020 – R
2019 – M
2018 – L
2017 – H
2016 – G
2015 – F
2014 – D
2013 – A Small Chassis
(rear view)
Model Serial ID Tag
Large Chassis
(front view)
Mini Manual
Mini Manual and
Model Serial ID Tag
Model Number
A Z 9 1 H 1 2 D 2 C W 1
Zoneline®
Chassis Series
90: Cooling w/ Electric Resistance Heat
91: Cooling w/ Heat Pump and Electric
Resistance Heat
E: Cooling w/ Electric Resistance Heat
H: Cooling w/ Heat Pump and Electric
Resistance Heat
Engineering
Revision
K: GMCC Compressor
W: Rechi Compressor
C: Corrosion
S: Small
Heater Wattage
2: 2.5 kW
3: 3.45 kW
5: 5.0 kW
D: 230/208 V Single Phase
E: 265 V Single Phase
BTU/hr
09: 9,000
12: 12,000
18: 18,000

– 7 –
Introduction
This service guide is designed to be used in conjunction with the installation manuals provided with
each GE Vertical Zoneline.
This service guide was written to assist the professional HVAC service technician to quickly and
accurately diagnose and repair any malfunctions of this product.
This guide, therefore, will deal with all subjects in a general nature (i.e.: All text will pertain to all
models).
Important: It will be necessary to accurately identify the GE Vertical Zoneline being serviced to be
certain of a proper diagnosis and repair. (See the GE Vertical Zoneline Nomenclature section of this
service guide).
Changes to Design
• No slide out chassis. Panels must be removed to service components.
• Small chassis uses a single – double shafted fan motor.
• All electronics are operated on 230 volt supply, 265 volt GE Vertical Zonelines have a “auto–
transformer” to step down the voltage to 230 volts for all components except the resistive heaters.
• Large chassis models have 2 separate fan motors and capacitors.
• Small chassis models have a heater relay.
• Large chassis models have a compressor relay.
• Reversing valve default for heat pump models is COOLING (Coil energized for HEAT)”.

– 8 –
Features
• Quiet Start/Stop Fan Delay: The fan start and stop delays prevent abrupt changes in room
acoustics due to the compressor energizing or stopping immediately. Upon call for cooling or
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allows for "free cooling" by utilizing the already cool indoor coil to its maximum capacity by running
for 30 seconds after the compressor shuts off.
• Remote Thermostat Operation: GE Vertical Zonelines are controlled by a wired remote
thermostat.
• Internal Diagnostic Program: The GE Vertical Zoneline features a self-diagnostic program that
can alert maintenance to component failures or operating problems. The internal diagnostic
program saves time when diagnosing running problems.
• Service Fault Code Storage: The self-diagnosis program will also store fault codes in memory if
certain conditions occur and correct themselves such as extreme high or low operating conditions
or activation of the room freeze protection feature. Storing fault codes can help determine if the
GE Vertical Zoneline faced obscure conditions or if an fault occurred and corrected itself.
• Random Compressor Restart: The random restart delay eliminates multiple GE Vertical
Zonelines from starting at once following a power outage or initial power up. The compressor
delay will range from 180 to 240 seconds.
• Heat Pump GE Zonelines: Thermistor - The new GE Vertical Zoneline uses a thermistor to
accurately monitor the outdoor coil conditions to allow the heat pump to run whenever conditions
are correct. Running the GE Vertical Zoneline in heat pump mode saves energy and reduces
operating costs. The thermistor allows maximization of heat pump run time.
• Instant Heat: Heat Pump Mode - Heat pump models will automatically run the electric heater
during compressor lock-out to quickly provide heat when initially energized, then return to heat
pump mode. This ensures that the room is heated quickly without the usual delay associated with
heat pump GE Vertical Zonelines.
• Room Air Sampling Feature: The room air sampling feature maintains a balanced temperature
throughout the room by circulating the air for 90 seconds once every 9 minutes that the GE Vertical
Zoneline is not running when it is set to cooling or heating mode. By circulating the air, the GE
Vertical Zoneline can detect hot or cold areas in the room and operate the GE Vertical Zoneline to
cool or warm the room as necessary. This function is only available when the fan mode is set to
'AUTO' during COOL or HEAT Mode.
• Desk Control Ready: All GE Vertical Zonelines have low voltage terminals ready to connect to a
desk control energy management system. Controlling the GE Vertical Zonelines on/off operation
from a remote location like a front desk can reduce energy usage and requires no additional
accessories at the GE Vertical Zoneline.
• Indoor Coil Frost Sensor: The frost sensor protects the compressor from damage in the event
WKDWDLUÀRZLVUHGXFHGRUORZRXWGRRUWHPSHUDWXUHVFDXVHWKHLQGRRUFRLOWRIUHH]H:KHQWKH
indoor coil reaches 30°F the compressor is disabled and the fan continues to operate based on
demand. Once the coil temperature returns to 45°F, the compressor returns to operation.
• Auxiliary Fan Ready: The GE Vertical Zoneline features a 24 VAC terminal for connection to a
relay that may be used to operate an auxiliary fan to transfer air to adjoining rooms. Auxiliary fans
can provide air conditioning to odd shaped rooms.
*All features are similar to previous models.

– 9 –
Electronic Control Sequence Of Operation
NOTE: The GE Vertical Zoneline is operated by a wired remote wall thermostat which is connected to
an electronic control board at the GE Vertical Zoneline.
Compressor and Reversing Valve Control
*The Reversing valve stays in the last state until a call for heat or cooling.
Cooling Mode
Once the ambient temperature rises past the cool demand set point of the thermostat, and if the
compressor is not locked out, the cooling cycle begins. The fan is started 5 seconds prior to the
compressor. Once the ambient temperature has been lowered to the cool set point, the cooling cycle
starts to terminate by shutting off the compressor. After a 30 second delay, the fan is shut off.
Heating Mode Control Operation
There are two heating methods: Heat Pump and Electric Resistance Heat.
There are 2 types of GE Vertical Zonelines that provide heating:
• Heat Pump with Electric Heat
• Cool with Electric Heat
Heat Mode in Cool with Electric Heat Zonelines
When the thermostat is in the Heat Mode, if the indoor ambient temperature is below the heat set point
and the compressor is not locked out, then the compressor turns on. If the ambient temperature rises
above the thermostat's heat set point, the compressor turns off.
If the Compressor is Locked Out on the 3 Minute Time Delay and Electric Heat is Available
1. The control turns on the electric heat until the compressor is not locked out.
2. After lockout, the control turns off the electric heat, waits 5 seconds, then turns on the compressor.
(The wired remote wall thermostat's time delay may override this feature).
3. If the outdoor coil temperature sensor drops to 30°F or less for 2 consecutive minutes, the GE
Vertical Zoneline will switch to electric heat (if available). Thereafter, the GE Vertical Zoneline will
switch back to Heat Pump heat until the outdoor coil temperatures sensor rises to 45°F or greater.
Active Mode Compressor Reversing Valve State*
Cooling On De-Energized
Heat - Heat Pump (Compressor
heat) On Energized
Heat Pump Electric Heat Off Energized
Heat - Electric Heat / Cool Zoneline Off De-Energized
Fan only Off *

– 10 –
Compressor Lock Out Time
The lockout feature ensures that the compressor is de-energized for a period of time. The timer varies
randomly from 180 to 240 seconds.
The compressor lockout is initiated every time the compressor is "off" due to:
1. Satisfying the thermostat temperature set point
2. Changing mode to fan only or heat
3. Turning the GE Vertical Zoneline off
4. Power is restored after failure
5. Line power is restored from a brown out condition
Cooling Fan Delay
This is only for the thermostat Fan Auto Mode only.
When the GE Vertical Zoneline cycles cooling ON - starts the fan 5 seconds EARLY.
When the GE Vertical Zoneline cycles cooling OFF - DELAYS the fan off for 30 seconds.
Heating Fan Delay
This is only for Fan Auto Mode (fan cycles with cool/heat operations) and not for continuous fan mode.
When the GE Vertical Zoneline cycles Heating ON - starts the fan 5 second EARLY.
When the GE Vertical Zoneline cycles Heating OFF - DELAYS the fan off for 15 seconds.
Continuous fan operation enables the fan to run continuously.
Fan Speed Change Delay
Relay activation is delayed by a minimum number of seconds. The default for this value is 2 seconds
and is used to eliminate relay chatter.
Room Air Sampling Feature
The room air sampling feature maintains a balanced temperature throughout the room by circulating the
air for 90 seconds once every 9 minutes that the GE Vertical Zoneline is not running when it is set to
cooling or heating mode. By circulating that air, the GE Vertical Zoneline can detect a hot or cold area
in the room and operate the GE Vertical Zoneline to cool or warm the room as necessary. This function
is only available when the fan mode is set to 'AUTO' during COOL or HEAT mode.

– 11 –
All GE Vertical Zonelines have a low voltage
interface connector through which a Remote Wall
Thermostat, Desk Control and Auxiliary Fan's
Relay can be connected. The interface connector
is located on the electronic control board.
Figure 1: Interface Connector Location
Table 1
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be controlled by using a single stage heat/cool
remote wired wall mounted thermostat.
Thermostat Selection
These thermostats are single stage heat/cool,
with manual changeover. Other thermostats may
be used as long as they are single stage heat/
FRRODQGDUHFRQ¿JXUHGFRUUHFWO\IRUWKH=RQHOLQH
Thermostat Terminals Requirements:
• For cooling with electric heat GE Vertical
Zonelines: C, R, G, Y, W.
• For heat pump GE Vertical Zonelines: C, R,
G, Y, W, B.
• For two fan speeds, the thermostat must
have 2 fan speed selection.
HEAT PUMP Zonelines
During Heat Mode:
The B terminal must be continuously energized.
The W terminal must have 24 VAC output to call
for heat. The control board decides on whether
to turn on the Heat Pump Heat (compressor) or
Electric Heat. The Y terminal should not have 24
VAC output during heat mode.
,QWHUIDFH&RQQHFWRU'H¿QLWLRQV
FP Factory use only
(Ensure there is no jumper at FP and
F2)
F2 Used with F1 to provide 24 VAC to
external fan relay
(Ensure there is no jumper at FP and
F2)
F1 Used with F2 to provide 24 VAC to
external fan relay.
D2 Used with D1 for desk control on or
off operation
D1 Used with D2 for desk control on or
off operation
C Common Ground Terminal
GH Call for high fan
GL Call for low fan
BCall for heat pump reversing valve
YCall for compressor
WCall for heating
R24 VAC power from Electronic Control
to wall
Low Voltage Interface Connections Remote Wall Thermostat
RAK164D2 Cooling with Electric Heat
Digital Thermostat
RAK164P2 Cooling with Electric Heat
Programmable Thermostat
RAK148D2 Heat Pump Digital Thermostat
RAK148P2 Heat Pump Programmable
Thermostat

– 12 –
Connect the thermostat using Figure 1 and Table
1 from the previous page (under Low Voltage
Interface Connections) as a guide.
Ensure that there is no jumper wire at FP and F2,
the follow the procedure below:
1. Disconnect power to the GE Vertical Zoneline.
2. Unscrew and remove the electrical control
box's cover.
3. Locate the Interface Connector (24 VAC
terminal strip (see Figure 1 from the previous
page, under Low Voltage Interface
Connections).
4. Make the wire connections according to the
FRQ¿JXUDWLRQQHHGHGIRU*(9HUWLFDO=RQHOLQH
Use #18 gauge wire size.
5. Once each wire is matched and connected,
the GE Vertical Zoneline is now ready to be
controlled by the thermostat.
6. Reattach the electrical control box's cover.
Caution
It is the installer's
responsibility to ensure
that all control wiring
connections are made
in accordance with the
installation instructions.
Improper connection of the
thermostat control wiring
and/or tampering with
the GE Vertical Zonelines
internal wiring can void the
equipment warranty.
Failure to follow these
instructions can result in
personal injury and damage
to product or other property.
Remote Wall Thermostat Location
The thermostat should not be mounted where
it may be affected by drafts, discharge air from
registers (hot or cold), or heat radiated from the
sun appliances, windows, etc. The thermostat
VKRXOGEHORFDWHGDERXWIWDERYHWKHÀRRULQ
an area of average temperature, with good air
circulation.
Mercury bulb type thermostats MUST be level to
control temperature accurately to the desired set-
point. Electronic digital type thermostats should
be level for aesthetics.
NOTE: An improperly operating or poorly located
remote wall thermostat can be the source of
perceived equipment problems. A careful check
of the thermostat's location and wiring must be
made then to ensure that it is not the source of
the problems.
Connecting a Remote Wall Thermostat
Thermostat Location

– 13 –
Wire Size Maximum Length
#24 400 ft
#22 600 ft
#20 900 ft
#18 1500 ft
#16 2000 ft
Desk Control
Servicing / Chassis Quick Change Outs
The chassis is designed for quick disconnected
and change out. For minor electrical service,
the control box cover lifts straight up after the
screws and disconnect head are removed. For
major electrical, refrigeration and fan service the
chassis may be removed from the utility closet.
To Remove the Chassis from the Closet:
1. Disconnect the power coming into the
Zoneline from the main breaker panel or the
closet mounted disconnect.
2. Switch the wall thermostat off.
3. Pull the Power Disconnect located in the front
of the chassis.
4. Disconnect the electrical connection.
5. Disconnect the duct work.
6. Disconnect the condensate drain on 9-18,000
BTU models (refer to the Installation section
of this service guide).
7. Slide the chassis out of the wall plenum.
8. Lift the chassis out of the utility closet.
Auxiliary Fan Control
Service
The GE Vertical Zonelines electronic control has
built-in provisions for connection to an external
switch to control power to the GE Vertical
Zoneline. The switch can be a central desk
control system or even a normally open door
switch.
For desk control operation, connect one side of
the switch to the D1 terminal and the other at the
D2 terminal (see Figure 1 under Low Voltage
Interface Connections). Whenever the switch
closes, the GE Vertical Zoneline operation will
stop.
Maximum Wire Length for Desk Control
Switch
The electronic control also has the ability to
control a 24 VAC relay to activate an auxiliary,
or transfer fan. The outputs are listed as F1 and
F2 on the interface connector (using Figure
1 and Table 1 under Low Voltage Interface
Connections).
To connect the relay, simply wire one side of the
relay to F1 and the other side to F2. Anytime that
the fan runs, the terminals will send a 24 VAC
signal to the relay. The relay must be 24 VAC, 50
mA or less.
NOTE: The Desk Control,Auxiliary Fan relay and
ZLUHVPXVWEH¿HOGVXSSOLHG

– 14 –
Grille Kit
RAVAL2
Part A
Outside
Wall
Plenum
Exterior
Outside
Wall Part B
Inside
Wall Plenum
Small Chassis
(Unit Height 32")
Filter (14" x 20")
Unit
Installation
IMPORTANT: Plan and locate plenum, electrical connection, drains and thermostat carefully to avoid
LQWHUIHUHQFH+DUGWRUHDFKORFDWLRQVZLOOPDNHLQVWDOODWLRQDQGVHUYLFHGLI¿FXOW
Utility Closet Connection Locations
Small Chassis
8VHÀH[LEOHRUKDUG
conduit for direct
connection
Use rigid duct for
90° bends and tees
Flex duct may be used
for transitions only
Outside wall
Unit slides into wall plenum
approximately 2”.
Primary Drains
• A drain connection is located on the
back of the unit approximately 2” from
the left side.
• A drain connection is located on
the right and left side of the unit
approximately 16” from the front of the
unit.
Raised Platform
Surface
recommended 8”
minimum height.
Reference Dimensions
AThermostat cable
BIncoming Power Conduit
C8QLWZLGWKDQGGHSWK»´
DUnit height: 30-5/8” (32-3/4” with
duct)
ECondensate drains: 3/4” connector
Choose one of THREE Primary
Drain
locations:
• 1 - Right Side
• 1 - Left Side
• 1 - Back (Plenum) Side
• 6HFRQGDU\GUDLQZDWHUÀRZVLQWR
plenum from the back of the unit.

– 15 –
Small Chassis
• Power Input: All models are hard wired to the AC power supply. A quick disconnect is provided to
remove power from the GE Vertical Zoneline. CAUTION: Voltage is still applied to the input side
RIWKHGLVFRQQHFW$OORWKHUFRPSRQHQWVGRQRWKDYHSRZHUZLWKGLVFRQQHFWUHPRYHGFuses are in
line with supply on 265 volt models.
• Control Boards: A MAIN board contains the relays that operate the components. The MAIN board
receives thermostat signals and responds to operate the loads as required. Also, a DISPLAY board
is provided for displaying fault codes.
• Heater Relay: Used on 265 volt models which enables these models to use the full 265 volts to
the heater assembly.
• Capacitor: All models use a dual capacitor, one section for the compressor and the other section
for the fan motor. On small chassis, this capacitor is mounted in the control area.
• Fan Motor: A double shaft fan motor is used on the small chassis models. They are two speed
motors and the blades are attached to the shaft with clamps.
• Heater0RGHOVSHFL¿FKHDWHUVDUHXVHGN:IRUDPSFLUFXLWVN:IRUDPSFLUFXLWVDQG
5.0kW for 30 amp circuits.
• Transformer (265 volt model): This “auto-transformer” is mounted below the power disconnect.
The input to the transformer is fused and the output to the control board L2 is also fused.
All components EXCEPT the heater assembly are operated on 230 volts, the transformer “steps-
down” the 265 volts to 230 volts. Less components are required for stock.
• Thermistors: Heat pump models use an indoor coil sensor, outdoor coil sensor and ambient
air sensor to determine proper operation. All three thermistors are the same resistance at room
temperature. The outdoor coil sensor is not used onAZ90 models. The ambient air sensor is
plugged directly into the main board and has short wires connected to it. No mounting bracket is
provided for it.

– 16 –
6PDOO&KDVVLV&RPSRQHQWV,GHQWL¿FDWLRQV
Front Side Left and Front Sides
Nameplate 10' Duct Collar
Heater
Diagnostic
Touch Pad
Fresh Air Vent
Evaporator Coil
Pullout
Disconnect
Evaporator Coil
Evaporator
Coil Thermistor
Compressor
Condenser Coil
Thermistors
Condenser
Right Side Left and Back Sides
Condenser Air
Discharge
Condenser Fan
Shroud
Blower/Fan
Motor
Condenser
Fresh Air Vent
Door
Blower Wheel
Heater
Condenser Air
Intake

– 17 –
6PDOO&KDVVLV&RPSRQHQWV,GHQWL¿FDWLRQVFRQWLQXHG
265 Model Transformer Fuse
Pull Out
Disconnect
Transformer
Heater Relay
Line Fuses
Transformer
Fuse
265 Model Front
Evaporating
Coil
Main Control
PCB
Transformer
Fuse Block
Pull Out
Disconnect
Heater Relay
Capacitor
Service Module

– 18 –
Small Chassis Component Access
Remove quick disconnect and nine 1/4 in. hex head screws, then slide the panel up and out of
the GE Vertical Zoneline.
Control Panel Access
Control Area
Control Area Opened

– 19 –
Remove the control panel, and disconnect the two wires from the heater assembly. Remove the two
1/4 in. hex head screws from the heater. Disconnect the duct from the top of the GE Vertical Zoneline
and pull the heater assembly up through the duct opening. If the duct cannot be removed, the right side
panel will have to be removed for heater removal.
Heater
Heater
Small Chassis Component Access (continued)
Transformer (265 Volt Models): Remove the control panel. One 1/2 in. nut secures the transformer to
the control area bracket.
Transformer (265 Volt Models)
Motor Winding Resistance
Model Measurement :LQGLQJ5HVLVWDQFH
Indoor Motor Outdoor Motor
AZ90E09, AZ90E12,
AZ90E18, AZ91H09,
AZ91H12, AZ91H18E*S
WHITE TO BROWN 48 ± 10% NAWHITE TO BLUE 35 ± 10%
WHITE TO BLACK 30 ± 10%
AZ91H18D*C,
AZ91H18E*C
WHITE TO BROWN 272 ± 10% 77 ± 10%
WHITE TO BLUE 177 ± 10% NA
WHITE TO BLACK 151 ± 10% 37 ± 10%
Heater Resistance
Model Heater 5HVLVWDQFH
AZ90E09D, AZ90E12D,
AZ90E18D, AZ91H09D,
AZ91H12D
2.5 kW 18.61 ± 5%
3.4 kW 13.68 ± 5%
5.0 kW 9.31 ± 5%
AZ91H09E, AZ91H12E,
AZ91H18E*S
2.5 kW 24.86 ± 5%
3.4 kW 18.17 ± 5%
5.0 kW 12.35 ± 5%
AZ91H18D*C 2.5 kW 18.61 ± 5%
3.4 kW 13.86 ± 5%
5.0 kW 9.31 ± 5%
AZ91H18E*C 2.5 kW 24.71 ± 5% 3.4 kW 18.17 ± 5%
5.0 kW 12.35 ± 5%

– 20 –
Heater Side
Side panel removed to access heater if duct cannot be removed.
Heater Top
Small Chassis Component Access (continued)