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18

TROUBLESHOOTING INFORMATION: UNITARY DIAGNOSTIC CODES

Digit3

Digit2

Digit 1

•  Run time fo r  last 4 cycles is 
less than 3 minutes  each.
• Co mpresso r pro tecto r has no t 
tripped.
• Lo w pressure and high 
pressure switches are clo sed.
• Integrated co ntro l mo dule 
diagno stic/status LED <lisp!ay 
sho  ws the indicated co de   .

BLANK

0

3

•  Sho rt Cycling

•  Intermittent 
thermo stat 
demand.
•  Faulty 
co mpresso r relay.

•  Check 
thermo stat and 
thermo stat wiring; 
repair/ replace as 
needed.
• Check 
co mpresso r relay  
o peratio n; replace 
co ntro l as needed.

• Turn po wer OFF 
prio r to  repair.
• Fault will clear 
after 4 co nsecutive 
no rmal cycles.
• Fault may  be 
cleared by cycling 
24VA C to  co ntro l.
• Replace with 
co rrect 
replacement 
part(s).
•  M inimum 
co mpresso r run 
time is changed 
fro m 30 seco nds 
to  3 minutes.

• Co mpresso r and o utdo o r fun 
are o ff.
•  Co mpresso r  pro tecto r  trips 
fo ur co nsecutive times.
•  A verage run time between trips 
is less than 15 seco nds.
• Integrated co ntro l mo dule 
diagno stic/status LED display 
sho ws the indicated co de.

BLANK

0

4

• Lo cked Ro to r

•  Co mpresso r 
bearings are 
seized.
•  Failed 
co mpresso r run 
capacito r.
•  Faulty run 
capacito r wiring.
•  Lo w line vo ltage.

• Check 
co mpresso r 
o peratio n;  repair/ 
replace as needed.
• Check run 
capacito r; replace 
as needed.
•  Check wiring; 
repair/replace as 
needed.
•  Verify line vo ltage 
is within range o n 
rating plate; 
co ntact lo cal utility 
is o ut o f range.

• Turn po wer OFF 
prio r to  repair.
• M ust clear fault 
by cycling 24V A C 
to  co ntro l.
• Replace with 
co rrect 
replacement 
part(s).

• Co mpresso r and o utdo o r fun 
are o ff fo r greater than 4 ho urs.
• Lo w pressure and high 
pressure switches are clo sed.
• Integrated co ntro l mo dule 
diagno stic/status LED display 
sho ws the indicated co de.

BLANK

0

5

•  Open Circuit

•  P o wer is 
disco nnected.
•  Failed 
co mpresso r 
pro tecto r.
•  Co mpresso r no t 
pro perly wired to  
co ntro l.

•  Check circuit 
break ers and 
fuses .
•  Check wiring to  
unit; repair/ replace 
as needed.
• Check 
co mpresso r 
repair/replace as 
needed
• Check 
co mpresso r wiring; 
repair/ replace as
needed.

•  Turn po wer OFF 
prio r to  repair.
• Fault will clear 
after 1 no rmal 
cycle.
• Fault may  be 
cleared by cycling 
24V A C to  co ntro l.
• Replace with 
co rrect 
replacement 
part(s).

•  Co mpresso r and o utdo o r fun 
are o ff.
• Lo w pressure and high 
pressure switches are clo sed.
• Integrated co ntro l mo dule 
diagno stic/status LED display 
sho ws the indicated co de.

BLANK

0

6

•    Open  Start 
Circuit

•  Co mpresso r 
start winding is 
o pen.
•  Failed 
co mpresso r run 
capacito r.
•  Faulty run 
capacito r wiring.
•  Co mpresso r no t 
pro perly wired to  
co ntro l.
•  Faulty 
co mpresso r wiring.

• Check 
co mpresso r 
repair/replace as 
needed.
• Check run 
capacito r; replace 
as needed.
• Check wiring; 
repair/replace as 
needed.

• Turn po wer OFF 
prio r to  repair.
• Fault will clear 
after 1 no rmal 
cycle.
• Fault may  be 
cleared by cycling 
24V A C to  co ntro l.
• Replace will 
co rrect 
replacement 
part(s).

UNITARY DIAGNOSTIC CODES

Sym ptom s 

o f

Abnorm al Operation 

(Legacy 

& 

Com fortNet™ 

T he rm o s t a t )

Diagnostic/Status 

LED Display Codes

Fault 

Description

Possible 
Causes

Corrective 

Actions

Notes 

&

Cautions

Содержание DZ16TC0241

Страница 1: ...d units CODES REGULATIONS This product is designed and manufactured to comply with na tional codes Installation in accordance with such codes and or prevailing local codes regulations is the responsibility of the in staller The manufacturer assumes no responsibility for equip ment installed in violation of any codes or regulations Rated performance is achieved after 72 hours of operation Rated per...

Страница 2: ...ions Either side adjacent the valves can be placed toward the structure provided the side away from the structure maintains minimum service clearance Corner in stallations are strongly discouraged OK OK AA AA A A C C C C OK OK OK OK NOT RECOMMENDED AA AA AA AA AA B B B B Model Type A B C AA Residential 10 10 18 20 Light Commercial 12 12 18 24 Minimum Airflow Clearance This unit can be located at g...

Страница 3: ...utting the tubing install plugs to keep refrigerant tubing clean and dry prior to and during installation Tubing should always be cut square keeping ends round and free from burrs Clean the tubing to prevent contamination Do NOT let refrigerant lines come in direct contact with plumbing ductwork floor joists wall studs floors and walls When run ning refrigerant lines through a foundation or wall o...

Страница 4: ...a blockage or failure of the metering device 3 After brazing quench the joints with water or a wet cloth to prevent overheating of the service valve 4 Ensure the filter drier paint finish is intact after brazing If the paint of the steel filter drier has been burned or chipped repaint or treat with a rust preventative This is especially important on suction line filter driers which are continually...

Страница 5: ...AMAGE USE COPPER CONDUCTORS WARNING The condensing unit rating plate lists pertinent electrical data necessary for proper electrical service and overcurrent protec tion Wires should be sized to limit voltage drop to 2 max from the main breaker or fuse panel to the condensing unit Con sult the NEC CEC and all local codes to determine the correct wire gauge and length Local codes often require a dis...

Страница 6: ...hecked using superheat when using a piston and subcooling when using TXV equipped indoor coil to verify proper charge Open the suction service valve first If the liquid service valve is opened first oil from the compressor may be drawn into the in door coil TXV restricting refrigerant flow and affecting operation of the system When opening valves with retainers open each valve only until the top o...

Страница 7: ...ing guidelines and methods to check unit operation and ensure that the refrigerant charge is within limits Charge the unit on low stage 1 Purge gauge lines Connect service gauge manifold to base valve service ports Run system at least 10 minutes to allow pressure to stabilize 2 Temporarily install a thermometer on the liquid line at the liquid line service valve and 4 6 from the compressor on the ...

Страница 8: ...ree times Refer to the fault code definitions at the end of this manual for more details 6 A forced defrost can be initiated by pressing TEST and RECALL push buttons simultaneously for more than 1 second with a valid call for heat The forced defrost can be terminated by A 10 minute lapse in time A coil temperature rise above 75 F or By pressing the two buttons again for more than 1 sec ond COMFORT...

Страница 9: ...ay be removed wire connections made to the plug and replaced It is strongly recommended that you do not connect multiple wires into a single terminal Wire nuts are recommended to ensure one wire is used for each terminal Failure to do so may result in intermittent operation Typical 18 AWG thermostat wire may be used to wire the system components 150 feet is the maximum recommended length of wire b...

Страница 10: ...wer supply to the air conditioner heat pump is continuously below 187 VAC The control will only store this fault the first three consecutive times the fault occurs NOTE It is highly recommended that the fault history be cleared after performing maintenance or servicing the heat pump IDENTIFICATION Model Number Serial Number and Software Version are displayed within this menu A model number check w...

Страница 11: ...s and the corresponding potential problem Green receive LED Indicates network traffic The table below indicates the LED status and the corresponding potential problem LEARN button Used to reset the network Depress the button for approximately 2 seconds to reset the network SYSTEMTROUBLESHOOTING NOTE Refer to the instructions accompanying the CT compatible indoor air handler furnace modular blower ...

Страница 12: ... blocks are securely twisted together prior to inserting into terminal block Verify heat pump installation type legacy traditional or communicating Check data 1 data 2 voltages Rapid Flashing Normal network traffic Control is talking on network as expected None None Data 1 and data 2 wires reversed at heat pump thermostat or CT compatible indoor unit Check communications wiring data 1 data 2 wires...

Страница 13: ...Faulty Evap Fan Motor Repair or Replace Shorted or Grounded Fan Motor Test Motor Windings Improper Cooling Anticipator Check Resistance of Anticipator Shortage of Refrigerant Test For Leaks Add Refrigerant Restricted Liquid Line Remove Restriction Replace Restricted Part Open Element or Limit on Elec Heater Test Heater Element and Controls Dirty Air Filter Inspect Filter Clean or Replace Dirty Ind...

Страница 14: ...ent part Air conditioner heat pump fails to operate Integrated control module diagnostic status LED display shows the indicated code BLANK b 0 Circulator blower motor is not running when it should be running Indoor bIower motor problem Communications error between indoor and outdoor unit Check indoor bIower motor Check indoor bIower motor wiring Check indoor unit control Repair replace any faulty ...

Страница 15: ... to repair Use memory card for your specific model Insert memory card BEFORE turning power ON M emory card may be removed after data is loaded Turn power OFF before removing memory card Error code will be cleared once data is loaded Air conditioner heat pump fails to operate Air conditioner heat pump operating at reduced performance Air conditioner heat pump operating at low stage when e peeled to...

Страница 16: ...Four consecutive compressor protector trips with average run time between trips greater than 3 hours Compressor operating at high speed and outdoor fan operating at low speed Integrated control module diagnostic status LED display shows the indicated code BLANK 0 1 Low Side Fault Low refrigerant charge Restriction in liquid line Indoor blower motor failure Indoor thermostat set extremely low Verif...

Страница 17: ...motor capacitor replace as needed Turn power OFF prior to repair Fault will clear after 4 consecutive normal cycles Fault may be cleared by cycling 24 VAC to control Replace with correct replacement part s Compressor and outdoor fan are off Thermostat demand is present Intergrated control module diagnostic status LED display shows the indicated code BLANK 0 2 High Pressure Cut Out Trip Blocked con...

Страница 18: ...r M ust clear fault by cycling 24V AC to control Replace with correct replacement part s Compressor and outdoor fun are off for greater than 4 hours Low pressure and high pressure switches are closed Integrated control module diagnostic status LED display shows the indicated code BLANK 0 5 Open Circuit Power is disconnected Failed compressor protector Compressor not properly wired to control Check...

Страница 19: ...g 24 VAC to control Replace with correct replacement part s Compressor and outdoor fan are off Low pressure and high pressure switches are closed Open start circuit has been detected 4 times within 5 minute delay between each detection Integrated control module diagnostic status LED display shows the indicated code BLANK L 7 Open Run Circuit Lockout Compressor run winding is open Compressor not pr...

Страница 20: ...acitor Faulty run capacitor wiring Check compressor repair replace as needed Check wiring repair replaced as needed Check run capacitor replace as needed Turn power OFF prior to repair Fault will clear after 1normal cycle M ust clear fault by cycling 24 VAC to control Replace with correct replacement part s Air conditioner heat pump may appear to be operating normally Compressor protecor may be op...

Страница 21: ...irflow If cleaning of the outdoor coil becomes necessary hire a qualified servicer Inexperienced people could easily puncture the tubing in the coil Even a small hole in the tubing could eventually cause a large loss of refriger ant Loss of refrigerant can cause poor operation and or severe equipment damage Do not use a condensing unit cover to protect the outdoor unit during the winter unless you...

Страница 22: ...22 THIS PAGE LEFT INTENTIONALLY BLANK ...

Страница 23: ...23 THIS PAGE LEFT INTENTIONALLY BLANK ...

Страница 24: ...24 Our continuing commitment to quality products may mean a change in specifications without notice 2013 2014 2016 2017 5151 San Felipe St Suite 500 Houston TX 77056 www daikincomfort com ...

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