Table of Contents
Advertisement
Quick Links
LEZETi Off-Grid DC4812VRF_SERVICE MANUAL V2.1
MODEL: DC4812VRF
48V DC AIR CONDITIONER
SERVICE MANUAL
WARNING!
This unit uses high voltage DC power. There are multiple capacitors
within the unit that may contain dangerous power, even after the
power supply has been disconnected.
Capacitors MUST BE DISCHARGED before servicing any electrical
components of this unit!
Advertisement
Table of Contents
Subscribe to Our Youtube Channel
Related Manuals for Lezeti DC4812VRF
Summary of Contents for Lezeti DC4812VRF
-
Page 1: Service Manual
LEZETi Off-Grid DC4812VRF_SERVICE MANUAL V2.1 MODEL: DC4812VRF 48V DC AIR CONDITIONER SERVICE MANUAL WARNING! This unit uses high voltage DC power. There are multiple capacitors within the unit that may contain dangerous power, even after the power supply has been disconnected. -
Page 2: Table Of Contents
Table o f C ontents 1. Precau*on ......................... 2 1 Safety Precau*on ......................2 2 Warning ..........................2 2. Specifica*ons ........................5 3. ... -
Page 3: Precau*On
LEZETi Off-Grid DC4812VRF_SERVICE MANUAL V2.1 1. P recau*on 1.1 S afety P recau*on To p revent i njury t o t he u ser o r o ther p eople a nd p roperty d amage, t he i nstruc*ons l isted b elow ... - Page 4 For i nstalla*on, a lways c ontact a n e lectrician o r a n A uthorized s ervice p rovider. • Do n ot i nstall t he p roduct o n a d efec*ve i nstalla*on s tand. • ...
- Page 5 Opera*onal c au*ons Do n ot e xpose t he s kin d irectly t o c ool a ir f or l ong p eriods o f * me. ( Do n ot s it i n t he draQ). ...
-
Page 6: Specifica*Ons
2. S pecifica*ons Model DC4812VRF Indoor DC4812VRF-‐IDU Outdoor DC4812VRF-‐ODU Power s upply 48V D C Cooling Capacity Btu/h 13098 Input Btu/w 18.61 SEER Btu/w 18.8 Hea*ng Capacity Btu/w 13632 Input 1081 3.69 HSPF Btu/w MAX.FUSE ... - Page 7 Indoor n oise l evel dB(A) 41/37/34 ( Hi/Mi/Lo) Indoor u nit Dimension ( W*D*H) 920 x 2 23 x 2 92 Dimension ( W*D*H) inch 36.3 x 8 .8 x 1 1.5 Packing ...
- Page 8 Refrigerant P iping Max. e leva*on Q. 26 Connec*on W iring -‐-‐ Plug t ype -‐-‐ Thermostat t ype Remote C ontrol Opera*on t emperature Indoor ...
-
Page 9: Dimensions
3. D imensions 3.1 I ndoor U nit Model W ( mm) H ( mm) D ( mm) DC4812VRF (36.22 i n) (11.50 i n) (8.78 i n) Model L ( mm) R ... -
Page 10: Outdoor Unit
W1 ( mm) A ( mm) B ( mm) Model (29.92 i n) (11.22 i n) (23.23 i n) (32.4 i n) (20.87 i n) (11.42 i n) DC4812VRF 9 ... -
Page 11: Refrigerant Cycle Diagram
4. R efrigerant C ycle D iagram 10 ... -
Page 12: Wiring Diagrams
5. W iring D iagram 5.1 I ndoor U nit ... -
Page 13: Outdoor Unit
5.2 O utdoor U nit 12 ... -
Page 14: Installa*On Details
6. I nstalla*on d etails 6.1 T orque W rench s heet f or i nstalla*on Outside d iameter Torque Addi*onal * ghtening t orque 6.35mm ... -
Page 15: Pipe Length And Eleva*On
6.3 P ipe l ength a nd e leva*on The p ipe l ength a nd r efrigerant a mount: Model Lineset l ength Air p urging m ethod Addi*onal ... -
Page 16: First *Me Installa*On
6.4 F irst * me i nstalla*on Air a nd m oisture i n t he r efrigerant s ystem h ave u ndesirable e ffects a s b elow: • ... - Page 17 6) E vacuate t he s ystem f or 3 0 m inutes a nd c heck w hether t he c ompound m eter i ndicates 0.1 ...
-
Page 18: Charging With Refrigerant Aqer Air Purging
6.6 C harging w ith r efrigerant a Qer A ir P urging (New s ystems a re p re-‐charged) Procedure: 1). W ith t he s ystem t urned o ff, c onfirm t hat b oth t he 2 -‐way a nd 3 -‐way v alves a re s et t o t he closed ... -
Page 19: Adding Refrigerant If The Pipe Length >5M
6.7 A dding r efrigerant i f t he p ipe l ength > 5m * N ote-‐The u nit i s p re-‐charged f or 3 -‐5 m eters. A dd r efrigerant, p er i nstruc*ons a bove, Beyond ... - Page 20 6.8 P ump D own w hen t he i ndoor u nit o r l ineset r equires s ervicing. C ollec*ng t he r efrigerant i nto t he o utdoor u nit “ Pump D own” Procedure ...
-
Page 21: R E--Installa*On W Hen T He O Utdoor U Nit R Equires S Ervice
6.9 R e-‐installa*on w hile t he o utdoor u nit r equires s ervice. E vacua*ng t he w hole s ystem Procedure: 1). C onfirm t hat b oth t he 2 -‐way a nd 3 -‐way v alves a re s et t o t he o pened p osi*on. 2). ... -
Page 22: Opera*On Characteris*Cs
7. O pera*on c haracteris*cs CAUTION: 1. I f a ir c ondi*oner i s u sed o utside o f t he a bove c ondi*ons, c ertain s afety p rotec*on features ... -
Page 23: Display Func*Ons
8.2 D isplay f unc*on I con e xplana*on o n i ndoor d isplay b oard . 22 ... -
Page 24: Built In Protec*On
8.3 B uilt i n P rotec*on 8.3.1 T hree M inute D elay a t r estart f or c ompressor 1 m inute d elay f or t he 1 st * me s tart-‐up a nd 3 m inutes d elay f or o thers. 8.3.2 ... -
Page 25: Opera*On Modes And Func*Ons
8.4 O pera*on M odes a nd F unc*ons 8.4.1 F an m ode ( 1) O utdoor f an a nd c ompressor s tops. ... - Page 26 8.4.2 C ooling M ode 8.4.2.1 C ompressor r unning r ules: T he o pera*on f requency o f c ompressor a Qer s tar*ng s ubmits t o f ollowing r ules. ...
- Page 27 H : R un a t F 1 f or 1 hour ( if T 1-‐Ts<-‐2C°, t he c ompressor w ill s top) M eanwhile, t he c ompressor r unning f requency i s l imited b y t he c urrent. ...
- Page 28 8.4.2.3 I ndoor f an r unning r ules I n c ooling m ode, i ndoor f an r uns a ll t he * me a nd t he s peed c an b e s elected a s h igh, m edium, ...
- Page 29 8.4.3 H ea*ng M ode 8.4.3.1 C ompressor r unning r ules: T he m aximum o pera*on f requency o f t he c ompressor a Qer s tar*ng a pplies t o t he f ollowing c hart. 28 ...
- Page 30 I f u sers s witch o n A C b y r emote c ontroller, t he c ompressor w ill r un a t t he F max f requency f or 7 ...
- Page 31 O ff: C ompressor s tops. D ecrease: D ecrease t he r unning f requency t o t he l ower l evel. H old: K eep t he c urrent f requency. ...
- Page 32 8.4.3.3 I ndoor f an r unning r ules: F or 1 2k, D C4812VRF m odels: I f t he c ompressor s tops c aused b y t he r oom t emperature r ising, t he i ndoor f an w ill b e f orced t o r un ...
- Page 33 8.4.3.4 D efros*ng m ode C ondi*ons o f d efros*ng: -‐ -‐-‐-‐T4＞0C°, W hen t he u nits a re r unning, i f t he f ollowing t wo i tems a re s a*sfied, t he u nits s tart d efros*ng: ...
- Page 34 8.4.3.5 E vaporator c oil t emperature p rotec*on -‐ -‐-‐-‐T2> T EH2C°, t he c ompressor r unning f requency d ecreases t o t he l ower l evel a nd r uns f or 2 0s. ...
- Page 35 8.4.5 D rying m ode 8.4.5.1 I ndoor f an s peed i s fi xed a t b reeze a nd c an’t b e c hanged. T he ...
- Page 36 8.4.7 T imer f unc*on 8.4.7.1 T iming r ange i s 2 4 h ours. 8.4.7.2 T imer o n. T he m achine w ill t urn o n a utoma*cally w hen r eaching t he s et * me. 8.4.7.3 ...
-
Page 37: Troubleshoo*Ng
9. T roubleshoo*ng S afety E lectricity i s s *ll k ept i n c apacitors e ven t he p ower s upply i s s hut o ff. D o n ot f orget t o d ischarge t he ... -
Page 38: Indoor Unit Error Display
9.1 I ndoor U nit E rror D isplay Display LED S TATUS EEPROM p arameter e rror Indoor / o utdoor u nits c ommunica*on error Zero-‐crossing ... -
Page 39: Outdoor Unit Error Display
9.2 O utdoor U nit E rror D isplay L ED1 ( Red) o n r ight 12 v dc T ransformer On = N ormal O pera*on LED2 ... -
Page 40: Power Tes*Ng At The Outdoor Unit
9.3 P ower t es*ng a t t he i ndoor u nit Outdoor Wire c olor Name Remark terminal b lock P Brown High ... -
Page 41: D Iagnosis A Nd S Olu*Ons
9.4 D iagnosis a nd S olu*ons 9.4.1 E EPROM p arameter e rror d iagnosis a nd s olu*on ( E0) Shut off the power supply and turn it on 5 seconds later. - Page 42 9.4.2 I ndoor / o utdoor u nit c ommunica*on d iagnosis a nd s olu*on ( E1) E1 w ill o ccur w hen t he b a^ery v oltage i s l ow. T he v oltage r ange i s from ...
- Page 43 9 .4.3 Z ero c rossing d etec*on e rror d iagnosis a nd s olu*on ( E2) 9.4.4 F an s peed h as b een o ut o f c ontrol d iagnosis a nd ...
- Page 44 9.4.5 I NDEX 1 1. I ndoor a nd O utdoor D C F an M otors Measure t he r esistance v alue o f e ach w inding b y u sing t he t ester. I f a ny r esistance v alue i s z ero, t he fan ...
- Page 45 9.4.7 O pen c ircuit o r s hort c ircuit o f t emperature s ensor d iagnosis a nd s olu*on ( E4/E5/F2) Ø ...
- Page 46 Resistance v alue ( KΩ) Temperature ( °C) Cen*grade t o F ahrenheit C onversion T able °C 10 11 12 13 14 15 16 ...
- Page 47 9.4.9 I PM m alfunc*on d iagnosis a nd S olu*on ( P0) 46 ...
- Page 48 9.4.10 H igh t emperature p rotec*on o f c ompressor t op d iagnosis a nd s olu*on(P2) 47 ...
- Page 49 9.4.11 I nverter c ompressor d rive e rror d iagnosis a nd s olu*on ( P4) 48 © 2015 CLIMATEKNOLOGIES, LLC...
Need help?
Do you have a question about the DC4812VRF and is the answer not in the manual?
Questions and answers