AirTap ATI50 User manual

Technical Manual
AirTap™ Hybrid Water Heater
ATI-T3.0.1

TABLE OF CONTENTS
ALARMS &
ERRORS CODES MAINTENANCE DUCTING CONTROLS &
OPERATING LOGIC SPECIFICATION
FAQsAPPENDIX
Specicaons 4-8
Controls & Operang Logic 9-12
Airow: Ducng & Fan Speed 13-15
Maintenance 16-18
Alarms and Errors Codes 19-20
FAQs 21-24
Appendix 25-32
Contact

4
SPECIFICATIONS
A. SPECIFICATION TABLE
SPECIFICATIONS (Models ATI50, ATI66 and ATI80)
Power supply 220-240V AC Single Phase
Frequency 60Hz
Electric outlet rating 30A
Heat pump output (ambient temp 68F) 2.75kW
Primary electric heater output 4kW
Back-up electric heater output 4kW
Maximum water temperature 135F
Maximum current 23A
COMPRESSOR
Make Panasonic
Model 5RS080FBA21
Type Hermetic Motor (Rotary)
Current rating 3.6A
Refrigerant R410A (17.6 oz)
Pressure HP:4.2MPa LP:0.2MPa
Suction tube ID 9.7mm
Discharge tube ID/OD 6.53/9.53mm
Tab. 1
B. POWER CONSUMPTION DATA FOR KEY COMPONENTS
Component Input voltage (V) Input power (W) Current (A) Max power (W)
Compressor 220 790 3.6 1100
Fan Motor 220 78 0.35 90
PCB 220 2.5 0.011 3.5
Electric Heater (Primary/Back-up) 220 4000 18.1 4200
Tab. 2
C. MAIN WIRING PORT
The unit is to be hard-wired to a 240V, 30A outlet using a exible conduit with a conduit connector. Locate the main
wiring port. There are three 10AWG wires within the main wiring port with soldered ends: L1, L2 and G (the G or
Ground wire is the yellow/green wire).
1. Remove the main wiring port access cover.
2. Feed the external electrical wires through the wire pass through by unfastening the out cable ring.
3. Connect these wires to the external electrical wires using insulated bu splice connectors or wing nuts (not
included). Ensure that:
A. External wires have a 10AWG rang
B. Bu splice connectors or wing nuts have the correct rang to connect two 10AWG wires. If wing nuts are used:
i. Use #10 red wing nuts for copper to copper connecons or #10 purple wing nuts for copper to aluminum
connecons.
ii. Clip the soldered ends of the unit’s wire and strip the insulaon sheath adequately to avail unsoldered wire
ends.
4. Place the wires back in the unit, replace the access cover and fasten the outer cable ring around the exing wires.
ALARMS &
ERRORS CODES MAINTENANCE DUCTING CONTROLS &
OPERATING LOGIC SPECIFICATION
FAQsAPPENDIX

5
SPECIFICATIONS
D. CIRCUIT DIAGRAM / WIRING SCHEME
Fig. 1
ALARMS &
ERRORS CODES MAINTENANCE DUCTING CONTROLS &
OPERATING LOGIC SPECIFICATION
FAQsAPPENDIX
C. MAIN WIRING PORT (CONT.)
When the main port is wired and power supply turned on, the electronic control panel is acvated. A second wiring
port is located next to the main wiring port and is labeled ‘Back up heater’. Under normal operaon, only the main
wiring port must be wired and the Back-up heater wiring port must remain un-wired. The back-up heater is an
emergency heang source and must be wired only when a system failure is prevenng the unit from operang
normally. This procedure must be authorized by AirGenerate and performed by a qualied technician. Failure to do so
will void the warranes on the product.

6
SPECIFICATIONS
E. DIMENSIONS & WEIGHT
D
H
ATI50 ATI66 ATI80
Height (H) 59½” 70½” 75½”
Diameter (D) 25½” 25½” 25½”
Weight (lbs) 195 243 254
Fig. 2
ALARMS &
ERRORS CODES MAINTENANCE DUCTING CONTROLS &
OPERATING LOGIC SPECIFICATION
FAQsAPPENDIX

7
SPECIFICATIONS
1Lid
2Heat Pump Cover
3Condensate Overow Drain
4Venlaon Fan
5Host Chassis
6Chassis Base
7Primary Condensate Drain
8Hot Water Outlet
9T&P Relief Valve
10 Tank Cover
11 Hand Grip
12 Cold Water Inlet
13 Drain Valve
14 Supporng Frame
15 Filter Access Cover
16 Exhaust Outlet
17 Control Panel
18 Electric Box
19 Compressor
20 Evaporator
21 Anode Port
22 Front Panel
23 Temp Liming Circuit Breaker (ATI66 & ATI80)
24 Protecve Cover
25 Primary Electric Element
26 Back-Up Electric Element Thermostat
27 Back-Up Electric Element
28 Back-Up Heater Wiring Port
29 Main Wiring Port
30 Temp Liming Circuit Break (ATI50)
31 Hand Grip
32 Air Inlet (Double Vent Version Only)
Fig. 3
F. EXPLODED VIEW
ALARMS &
ERRORS CODES MAINTENANCE DUCTING CONTROLS &
OPERATING LOGIC SPECIFICATION
FAQsAPPENDIX
Top View

8
SPECIFICATIONS
G. TANK CROSS-SECTIONAL VIEW
Fig. 4
1Hot Water Outlet
2Anode Rod
3Cold Water Inlet
4Drain
5Upper Water Temp Sensor (T1)
6Primary Electric Heater
7Lower Water Temp Sensor (T2)
8Back-Up Electric Heater
9Insulaon
10 Condenser Coils
ALARMS &
ERRORS CODES MAINTENANCE DUCTING CONTROLS &
OPERATING LOGIC SPECIFICATION
FAQsAPPENDIX

9
CONTROLS AND OPERATING LOGIC
A. TEMPERATURE AND PRESSURE SENSORS
The following sensors are inbuilt in the unit:
Temperature sensor type Terminology How to check?
1. Water temperature (upper) A0/T1 Press 'Up' arrow key
2. Water temperature (lower) A1/T2 Default display
3. Evaporator return line A2 Press 'Down' arrow key
4. Compressor discharge line A3 Press 'Up' & 'Down' arrow keys together
5. Ambient temperature A4 NA
6. Pressure sensor A5 NA
Tab. 3
1A4—Ambient Temp Sensor
2Anode Rod Port
3A5—Low Pressure Sensor
4A3—Compressor Discharged Temp Sensor
5A1—(T2) Lower Temp Sensor
6A0—(T1) Upper Temp Sensor
7A5—High Pressure Sensor
8A2—Evaporator Coil Temp Sensor
9A8—Condensate Blockage Sensor (V2.01 onwards)
Fig. 5
ALARMS &
ERRORS CODES MAINTENANCE DUCTING CONTROLS &
OPERATING LOGIC SPECIFICATION
FAQsAPPENDIX

10
CONTROLS AND OPERATING LOGIC
B. PCBA / CONTROL PARAMETERS
Tab. 4
Code Funcon Range Factory seng
F11 Water set temperature 90-135 F 130
F12 Heat pump kick-in dierenal* 1-54 F 20
F13 Max ambient temp for heat pump operaon 42-130 F 110
F14 Min ambient temp for heat pump operaon 0-40 F 32
F15 Heat pump re-start ambient temp dierenal** 1-20 F 9
F19 T1/T2 adjustment -9-9 F 0
F21 Compressor start delay 0-10 mins 3
F31 Defrost start A2 temp -20-77 F 28
F32 Defrost stop A2 temp 0-122 F 77
F33 Defrost start delay 1-999 mins 20
F34 Max defrost me 1-99 mins 5
F41 Fan speed control + 0/1/2 (Low/High/Auto) 1
F50 Pressure alarm*** 0/2 (O/On) 2
F51 Auto recovery aempts from F50 alarm 0-10 mes 3
F52 Auto recovery max me from F50 alarm 0-999 mins 60
F54 Primary heater overheang alarm**** 0/2 (O/On) 2
F55 Auto recovery aempts from F54 alarm 0-10 mes 3
F56 Auto recovery max me from F54 alarm 0-999 mins 60
F57 High compressor discharge temp alarm***** 0/1 (O/On) 1
F58 Compressor discharge high temp limit 50-257 F 230
F59 Compressor re-start temp dierenal 1-54 F 18
F60 Condensate drain blockade alarm****** + 0/1 (O/On) 1
F61 Acvate memory to retain sengs Yes/No Yes
F69 Communicaon band 24/48 BPS 24
F80 Set password O/Set value O
F89 Heater Mode max operang me 12-999 hours 48
F98 Force defrost Null/ADF Null
*Heat pump on if T2<=F11-F12; Electric heater on when T1<=F11-F12-10
**HP will restart when A4>=F14+F15 and A4<=F13-F15
***Error code A5 will display
****Error code A6 will display
*****Error code A7 will display
******Error code A8 will display
+ Applicable to product Version 2.01 or later
ALARMS &
ERRORS CODES MAINTENANCE DUCTING CONTROLS &
OPERATING LOGIC SPECIFICATION
FAQsAPPENDIX

11
CONTROLS AND OPERATING LOGIC
C. HOW CAN I ACCESS AND CHANGE THE CONTROL PARAMETERS?
You may check or change the current value of a parameter by following these steps:
1. Keep the ‘Mode’ buon pressed ll F11 displays on the screen
2. Press ‘Up’ or ‘Down’ arrow key to select a parameter
3. Press ‘Timer’ buon to check the current value of the selected parameter
4. To retain current value of the selected parameter, press the ‘Timer’ buon again to access other parameters
5. To change the current value of the selected parameter, press ‘Up’ or ‘Down’ arrow key to select a new value. Press
‘Timer’ buon to assign the newly selected value and access other parameters.
6. Once the parameter values have been checked/changed, let the panel remain idle for a few seconds to revert to
the default (me) display.
D. SETTING TIME AND HEAT PUMP OPERATING PERIODS
Time can be set in 24-hour HH:MM format. To set the me, press the ‘Clock’ buon. The hour (HH) parameter should
start ashing. Press ‘Up’ or ‘Down’ arrow key to assign the hour value. Press ‘Clock’ buon again. The minutes (MM)
parameter should start ashing. Press ‘Up’ or ‘Down’ arrow key to assign the minute value. Press ‘Clock’ buon again.
Heat Pump Timer Funcon and Operang Periods
The mer funcon is acve in ECON MODE ONLY. You may set up to three me periods (P1, P2 and P3) for the heat
pump to operate. Each me period has a user assigned start me and stop me. The heat pump will be on during the
assigned me periods only. Heat pump will turn o when water set temperature is reached, even if the unit is within
an assigned me period (water temperature controls override mer sengs). To assign or change me periods:
Ensure that the clock is set to the right me
1. Press Timer buon. The start me (Hours) for P1 will start ashing – use ARROW PADS to assign Hours for P1 start
me. Press Timer buon again to move to Minutes for P1 start me (EXAMPLE: If you want P1 to start at 7:15 am,
select 07 using arrow pad keys. Press Timer buon and select 15 using arrow pad keys).
2. Press the Timer buon to move to P1 end me and assign values as done in Step b.
3. Press the Timer buon to move to P2 (and P3) me sengs – repeat Steps b and c.
IMPORTANT
To acvate the heat pump in Econ mode, it is necessary that at least one me period is acve.
Can I override the mer sengs and let the heat pump run as needed (based on water temperature sengs) in Econ
mode?
To run the heat pump independently of the mer sengs, set any me period (P1, P2 or P3) to start at 00:00 and stop
at 23:59. The heat pump will now be controlled only by the water temperature sensor and the heat pump can start or
stop any me during the day based on hot water demand and temperature control sengs.
Do I need to assign values to all three me periods?
No, you can choose to assign values to as many me periods as you require and leave the others as ‘inacve’. Assigning
00:00 to both start and stop mes for a me period will render the me period inacve.
ALARMS &
ERRORS CODES MAINTENANCE DUCTING CONTROLS &
OPERATING LOGIC SPECIFICATION
FAQsAPPENDIX

12
E. MODES AND OPERATING CRITERIA
Users can choose to operate the unit in one of the following modes:
AUTO MODE (Default)
Operates heat pump AND primary electric heater
Heat pump ON if T2<=F11-F12
Heat pump OFF when T2=F11
Electric heater ON if T1<=F11-F12-10
Electric heater OFF when T1=F11
ECON MODE
Operates heat pump ONLY
Heat pump will acvate only during the set me periods (P1, P2 and P3), every day.
During each me period,
Heat pump ON if T2<=F11-F12
Heat pump OFF when T2=F11
NOTE: For the heat pump to start in Econ mode, BOTH mer and temperature control condions must be fullled:
i. Timer seng: Current/display me is within range of any of the three assigned heat pump operang me periods P1,
P2 or P3.
ii. Temperature sengs: Water set temperature (F11) and heat pump kick-in dierenal (F12) values meet the heat
pump start condion as dened above.
HEATER MODE
Operates primary electric heater ONLY
Electric heater ON if T1<=F11-10 degree F
Electric heater OFF when T1=F11
Note: The unit is programmed to run for a limited me in the Heater mode to conserve energy. Heater mode
duraon is controlled by parameter F89 (default value 48 hours) as dened in Secon B.
CONTROLS AND OPERATING LOGIC
ALARMS &
ERRORS CODES MAINTENANCE DUCTING CONTROLS &
OPERATING LOGIC SPECIFICATION
FAQsAPPENDIX

13
AIRFLOW: DUCTING & FAN SPEED
A. DUCTING EXHAUST AIR
Can I duct the exhaust air from the unit? What are the benets of ducng the exhaust air?
The unit has an exhaust air outlet that can be connected to a 6-inch duct. The cool exhaust air, a free by-product of
heat pump operaon, can be ducted to any part of the home. It can also be used to supplement home cooling, saving
you addional energy on home cooling costs during summer months. You may vent the exhaust air out of the home
during winter months.
Ducng is especially recommended if the install area is less than 1,000 cubic feet in volume or if the unit has low
overhead clearance.
WARNING:
This unit intakes ambient air in proximity to the unit and exhausts air that is cooler than the ambient air. If the exhaust air is vented
out of the install area by ducng the exhaust outlet, ensure that there is adequate air supply to the unit to avoid negave pressure.
Negave pressure occurs when the unit exhausts more air out of the install area than air allowed into the install area. Extra cauon
is advised if a wood stove or combuson heater is located in the install area. Ensure that the unit does not back-dra smoke from
the operaon of a wood stove or combuson heater into the home.
Airow
Airow
Fig. 6
ALARMS &
ERRORS CODES MAINTENANCE DUCTING CONTROLS &
OPERATING LOGIC SPECIFICATION
FAQsAPPENDIX
B. FAN SETTINGS
Starng from version 2.01, the ATI hybrid water heaters are built with a dual speed fan. Users can control fan speed
and airow by accessing parameter F41. The default seng is '1' (high speed). By changing F41 to '0', the airow rate
can be reduced by 20%. The lower fan seng will also reduce the noise level.
When should the lower fan seng be used?
If the unit is installed in an uncondioned space such as a garage or ac, high speed seng should be retained. Switch
to the lower speed seng if the unit is installed in a condioned space. Lower speed seng is also recommended if
there is a negave pressure concern at the high speed seng.

14
AIRFLOW: DUCTING & FAN SPEED
C. DUCTING INTAKE AIR
The AirTap Hybrid water heater is also available in a double vent version. The DV series can be ducted for both exhaust
and intake air.
Airow
Airow
ALARMS &
ERRORS CODES MAINTENANCE DUCTING CONTROLS &
OPERATING LOGIC SPECIFICATION
FAQsAPPENDIX
Fig. 7
High Speed Fan
Measurement
Low Speed Fan
Measurement
No. of
Elbow Duct Conguraon [Ft] Airow Measurement Point [Ft] Airow [CFM] Airow [CFM]
1
52.5 216.00 169.00
10 7.5 216.00 169.00
25 22.5 204.00 161.00
2
52.5 204.00 161.00
10 7.5 210.00 161.00
25 22.5 198.00 153.00
3
52.5 198.00 153.00
10 7.5 198.00 153.00
25 22.5 198.00 153.00
*The airow rates above apply to rigid ducng having a smooth inner surface. Airow rates will be impacted by turns and length at a signicantly higher rate if the
ducng is exible and has a ridged surface. For duct lengths longer than 10 feet, rigid ducng is recommended.
Tab. 5
B. FAN SETTINGS (CONT.)

15
AIRFLOW: DUCTING & FAN SPEED
D. DIMENSION, SPACE REQUIREMENT AND VENTILATION
Please check dimensions of the model you intend to install and ensure that the unit has a minimum of 1 feet of
clearance from the top. If the unit is ducted to vent the exhaust air, ensure that sucient clearance is available.
Ensure that air intake to the unit is not blocked or obstructed. It is recommended that the unit be strapped to a wall
for safety.
If the unit is installed in an enclosed room:
a. The room size must exceed 1,000 cubic feet OR
b. The room must have a louvered door or similar venlaon OR
c. The unit must be ducted to vent the exhaust air out of the enclosed area.
1’
Fig. 8
ALARMS &
ERRORS CODES MAINTENANCE DUCTING CONTROLS &
OPERATING LOGIC SPECIFICATION
FAQsAPPENDIX

16
MAINTENANCE
A. T&P / RELIEF VALVE
The relief valve is an important safety feature and must be checked at least once a year. You may li the lever handle
to release water from the unit and ensure that the valve is operang normally.
CAUTION:
Since the relief valve may release hot water from the unit, the water must be released directly into a suitable drain.
The relief valve must not be removed, plugged or obstructed under any circumstance.
B. FILTER
The unit is equipped with air lters that must be checked periodically (preferably every six months) for dirt or debris
that may impede airow. Please refer to the Exploded View on page 7. These lters are itemized as 15 and 16 (for dou-
ble vent version, lter itemized as 32 should also be checked). Filter 15 is removable and should be washed or rinsed
annually. This lter can be pulled out by unscrewing the lter slot screws on top of the unit.
C. ANODE ROD
The unit comes pre-aached with a sacricial anode rod to counter corrosive elements in the tank. Anode rods deplete
over me and it is recommended that the anode rod in the unit be checked every 5 years. If the anode rod is found to
be depleted, replace the anode rod. A DEPLETED ANODE ROD WILL RESULT IN TANK FAILURE. Please follow Fig. 14
instrucons to access the anode rod.
D. SEDIMENT BUILD-UP
Sediment build-up is a common occurrence on all water heaters. Since sediment deposits in the tank of the unit can
aect performance and compromise safety, it is recommended that the tank is drained periodically. AirGenerate™
recommends draining a few quarts of water every month and draining the unit completely every year.
CAUTION:
Shut o the power to the unit before draining the unit, even if you are draining a few quarts of water only. To drain
the unit completely, shut o the cold water supply and open hot water faucet(s). Unit must be drained by opening
the drain valve located at the boom of the unit.
WARNING: RISK OF ELECTRIC SHOCK
MAKE SURE THE UNIT IS COMPLETELY SHUT OFF AND UNPLUGGED FROM POWER SOURCE.
ALARMS &
ERRORS CODES MAINTENANCE DUCTING CONTROLS &
OPERATING LOGIC SPECIFICATION
FAQsAPPENDIX

17
G. MAINTENANCE SCHEDULE
AirGenerate™ recommends the unit be inspected annually by qualied service personnel to check electrical wiring,
controls and heang elements.
F. EXTENDED SHUTDOWN
If you will not be using the unit for an extended period of me, shut o the power and water supply to the unit. It is
recommended that the unit and water piping be drained completely. Drainage is necessary if the unit is exposed to
freezing temperatures. Ensure that the controls are checked by qualied personnel and the unit is completely lled
with water before restarng the unit aer an extended shutdown.
MAINTENANCE
E. CONDENSATE DRAIN TUBE
The unit is equipped with two condensate water drains – a primary drain and an overow drain. A monthly check is
recommended to ensure that these drains are not blocked. Blockage at the primary condensate water will trigger an
alarm and shut the heat pump o.
IMPORTANT
If the primary condensate drain is clogged the unit will sound an alarm and display error code A8. The unit will also
switch from Auto or Econ mode to Heater mode unl the condensate block is cleared. The unit will run an auto check
every 48 hours (default – can be changed by accessing parameter F89 in the control panel) for condensate clearance.
If the condensate has cleared, the unit will revert to Auto mode. Else, the unit will connue to operate in Heater
mode.
ALARMS &
ERRORS CODES MAINTENANCE DUCTING CONTROLS &
OPERATING LOGIC SPECIFICATION
FAQsAPPENDIX

18
I. ACCESS TO CRITICAL PARTS
Please follow the steps below to gain access to heat pump components (including lter), anode rod, temperature
liming reset buon and electric heang elements (primary and back-up).
1. Slide the control panel upwards to expose control panel docking connector
2. Remove connector and slide out the control panel completely
3. Unfasten decorave panel screws (2 places)
4. Unfasten metal bracket screws (2 places)
5. Unfasten heat pump enclosure base screws (4 places)
6. Remove the external electrical wires by following these steps:
A. Remove the main wiring port access cover
B. Separate the external wires from the unit’s internal wires by removing wing nuts/bu splice
connectors
C. Unfasten outer cable ring and pull out the external electrical wires
7. Remove heat pump enclosure
If an exhaust air vent is aached to the unit, ensure that the vent is temporarily removed before heat pump
enclosure is taken o.
Fig. 9
MAINTENANCE
ALARMS &
ERRORS CODES MAINTENANCE DUCTING CONTROLS &
OPERATING LOGIC SPECIFICATION
FAQsAPPENDIX

19
ALARMS AND ERROR CODES
The unit will sound an alarm and display an error code in the event of a malfuncon. If the unit is sound-
ing an alarm, note the ashing error code and turn o the unit by pressing the ‘O’ buon. Contact
support at AirGenerate before aempng to turn on the unit. Error codes range from A0 to A8.
Codes A0 to A4 are specic to inbuilt sensors in the unit:
A0: Upper water temperature sensor (T1) malfuncon. Since this sensor controls the primary electric heater, you will not be
able to run the unit in Auto or Heater modes. Switch to Econ mode or acvate Back-up heater by following the ‘Acvang Back-
up Heater’ procedure. Obtain new sensor from AirGenerate and follow sensor replacement procedure.
A1: Lower water temperature sensor (T2) malfuncon. Since this sensor controls the heat pump, you will not be able to run the
unit in Auto or Econ modes. Switch to Heater mode or acvate Back-up heater by following the ‘Acvang Back-up Heater’
procedure. Obtain new sensor from AirGenerate and follow sensor replacement procedure.
A2: Evaporator coil temperature sensor (A2) malfuncon. Since this sensor aects heat pump performance, you will not be able
to run the unit in Auto or Econ modes. Switch to Heater mode or acvate Back-up heater by following the ‘Acvang Back-up
Heater’ procedure. Obtain new sensor from AirGenerate and follow sensor replacement procedure.
A3: Compressor discharge temperature sensor (A3) malfuncon. Since this sensor aects heat pump performance, you will not
be able to run the unit in Auto or Econ modes. Switch to Heater mode or acvate Back-up heater by following the ‘Acvang
Back-up Heater’ procedure. Obtain new sensor from AirGenerate and follow sensor replacement procedure.
A4: Ambient temperature sensor (A4) malfuncon. Since this sensor aects heat pump performance, you will not be able to run
the unit in Auto or Econ modes. Switch to Heater mode or acvate Back-up heater by following the ‘Acvang Back-up Heater’
procedure. Obtain new sensor from AirGenerate and follow sensor replacement procedure.
A5: Operang pressure outside normal range. Check the following:
1. Ensure that the tank is completely full with water (especially if this is a new install and you are turning the unit on for the
rst me). Check this by opening a hot water faucet – water must ow in a steady, uninterrupted manner.
2. If the ambient temperature is close to the low or high ambient temperature operang limit, switch to Heater mode tempo-
rarily. Revert to Auto or Econ mode when ambient temperature has normalized.
3. If the unit is ducted, remove the duct and operate the unit.
4. If the alarm is sll not resolved, follow these steps and report ndings to AirGenerate support.
a. Deacvate alarm & let the unit run in Econ mode (to de-acvate A5 alarm, set parameter F50 to zero)
b. Check amperage (place a clamp meter around one of the live/hot wires)
c. Check exhaust temperature
d. Check evaporator coil temperature (A2) by pressing the ‘Down’ arrow buon
e. Check compressor discharge temperature (A3) by pressing ‘Up’ and ‘Down’ arrow keys together.
IMPORTANT: Do not run the unit for more than 15 minutes in Econ mode. Aer taking these readings, switch to Heat-
er mode again. Re-acvate alarm A5 by seng parameter F50 to 1.
f. If AirGenerate support recommends a refrigerant recharge, follow ‘Refrigerant Recharge’ procedure.
AirGenerate support may also request that addional troubleshoong measures or temperature readings be taken.
A6: Primary electric element over-heang. Switch to Econ mode or acvate back-up heater temporarily. Obtain new sensor (T1)
and new primary electric element from Airgenerate. Follow sensor and element replacement procedures.
ALARMS &
ERRORS CODES MAINTENANCE DUCTING CONTROLS &
OPERATING LOGIC SPECIFICATION
FAQsAPPENDIX

20
A7: Compressor discharge temperature (measured by sensor A3) over limit (limit set by parameter F58 – default
seng 230’F). Check the following:
1. If the water set temp (F11) is above 125’F, reduce it to 125’F temporarily.
2. If the ambient temperature is close to the high ambient temperature operang limit, switch to Heater mode
temporarily. Revert to Auto or Econ mode when ambient temperature has normalized.
3. If the alarm is sll not resolved, follow these steps and report ndings to AirGenerate support.
a. Deacvate alarm & let the unit run in Econ mode (to de-acvate A7 alarm, set parameter F57 to zero)
b. Check amperage (place a clamp meter around one of the live/hot wires)
c. Check exhaust temperature
d. Check evaporator coil temperature (A2) by pressing the ‘Down’ arrow buon
e. Check compressor discharge temperature (A3) by pressing ‘Up’ and ‘Down’ arrow keys together.
IMPORTANT: Do not run the unit for more than 15 minutes in Econ mode. Aer taking these readings,
switch to Heater mode again. Re-acvate alarm A7 by seng parameter F57 to 1.
f. If AirGenerate support recommends a refrigerant recharge, follow ‘Refrigerant Recharge’ procedure.
AirGenerate support may also request that addional troubleshoong measures or temperature readings be
taken.
A8: Condensate drain blockade alarm. Turn the unit o and check condensate drain/hose to ensure condensate wa-
ter is draining properly. Re-start unit.
ALARMS AND ERROR CODES
ALARMS &
ERRORS CODES MAINTENANCE DUCTING CONTROLS &
OPERATING LOGIC SPECIFICATION
FAQsAPPENDIX