Technibel Climatisation GRFMI 1158 R7I, Service Manual & Test Run Service Manual

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7 - 11
2-WAY MULTISET VRF SYSTEM
Trouble Diagnosis
7
H11, H12, H21, H22 Alarm
Alarm code
Alarm mea n i ng
Alarm co n ditio ns
Probable ca us e
Check
Correctio n
Example —
(1) Compre ss or fail u re (locked or partially locked)
(1) Compre ss or fail u re (partially locked)
(2) CT (C u rre n t Tra ns former) circ u it fail u re (i n cl u di ng c u t wiri ng )
( 3 ) Low power volta g e
(4) PCB fail u re
(1) Replace the compre ss or.
(2) Replace the CT circ u it.
( 3 ) Adj us t the primary- s ide power. Repair the power wiri ng .
(4) Replace the o u tdoor un it PCB.
(5) Correct the tro u ble.
* I n the ca s e of a compre ss or fail u re, it i s likely that s tep s m us t be take n to correct the ca us e
of the compre ss or fail u re ( su ch a s liq u id back- u p) i n order to preve n t rec u rre n ce. Be su re to
check that there i s n o ca us e which may re su lt i n compre ss or locki ng .
H11: Compre ss or 2 (co ns ta n t s peed) overc u rre n t alarm
H11, H21: D u ri ng operatio n , the compre ss or c u rre n t val u e exceeded 12 A for 3 0 s eco n d s or lo ng er.
However thi s alarm i s n ot detected for 4 s eco n d s after the compre ss or s tart s .
H12, H22: D u ri ng operatio n , the compre ss or c u rre n t val u e exceeded 15 A for 2 s eco n d s or lo ng er.
However thi s alarm i s n ot detected for 4 s eco n d s after the compre ss or s tart s .
H12: Compre ss or 2 (co ns ta n t s peed) lock c u rre n t alarm
H22: Compre ss or 3 (co ns ta n t s peed) lock c u rre n t alarm
H21: Compre ss or 3 (co ns ta n t s peed) overc u rre n t alarm
H11, H12, H21, H22
Tro u ble:
Check:
C u rre n t val u e d u ri ng operatio n g reatly exceed s the val u e s how n above.
Whe n the c u rre n t for each pha s e i s mea su red with a clamp meter or s imilar
i ns tr u me n t, check that the c u rre n t val u e for all pha s e s i s n ot hi g h. If MG wa s forced
ON ( us e ca u tio n ), check that compre ss or n oi s e will n ot occ u r or the compre ss or will
n ot r un with a g roa n i ng s o un d.
( 3 ) Low power volta g e
Tro u ble:
Check:
I n mo s t ca s e s , thi s occ u r s whe n a n other co ns ta n t- s peed compre ss or (i n cl u di ng
compre ss or s i n other un it s ) or other device s tart s . It al s o occ u r s whe n the power
wiri ng i s extremely lo ng .
Check the volta g e betwee n each of the pha s e s . However if thi s tro u ble occ u r s whe n
other device s or compre ss or s s tart, the n a n o s cillo s cope i s req u ired.
(4) PCB fail u re
Tro u ble:
Check: Check that the c u rre n t val u e mea su red with the clamp meter i s n ot lower tha n the
val u e mea su red with the PC or remote co n troller.
(2) CT circ u it fail u re, PCB fail u re
Tro u ble:
Check: · Check for poor co nn ector co n tact.
· Check the co n ti nu ity of the CT circ u it.
· I ns tall a n ormal CT i n place of thi s CT a n d check. If c u rre n t i s detected, the n the
PCB ca n be j u d g ed OK.
CT circ u it fail u re
· Check that c u rre n t i s flowi ng i n the pha s e where the CT circ u it i s co nn ected.
Check volta g e a n d c u rre n t.
1. 2WAY VRF DCI Alarm Codes