DAN

Danfoss A5

Medium

EKC 202A/B/C — Information: parameter o16 (max hold time after coordinated defrost) has expired — max hold time exceeded

Danfoss A5: Information: parameter o16 (max hold time after coordinated defrost) has expired — max hold time exceeded This fault usually isn't an immediate stop, but should be checked soon.

Possible causes

Signal to resume refrigeration after coordinated defrost (via data communication) failed to arrive
Network/gateway communication problem with the System Manager

Check steps

Check communication to gateway/System Manager (LON/MODBUS)
Set parameter o16 (Max HoldTime) appropriately; the controller will resume refrigeration on its own once elapsed

Affected parts

Gateway/System Manager
LON/MODBUS data communication module (EKA 178A/179A)

Safety note

De-energize the controller before servicing.

Source: Danfoss resmi servis kilavuzu (bagimsiz cift-dogrulandi) — Danfoss EKC 202A,B,C User Guide RS8DZ902 (Danfoss 2018-10), p.14, "Fault message" table: "A5: Information. Parameter o16 is expired" (short display text: "Max Hold Time"). Cross-referenced with p.12 parameter table: o16 = "Max. standby time after coordinated defrost" (range 0-60 min, factory default 20 min): "…

Reviewed by Anıl Güzeldemir — in the refrigeration machine room since 2006, developer of Enthalio.

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